Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

276 files changed, 15562 insertions, 0 deletions

diff --git a/js/src/tests/test262/language/expressions/function/S10.1.1_A1_T2.js b/js/src/tests/test262/language/expressions/function/S10.1.1_A1_T2.js
new file mode 100644
index 0000000000..3f0041712e
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/S10.1.1_A1_T2.js
@@ -0,0 +1,29 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    Program functions are defined in source text by a FunctionDeclaration or created dynamically either
+    by using a FunctionExpression or by using the built-in Function object as a constructor
+es5id: 10.1.1_A1_T2
+description: Creating function dynamically by using a FunctionExpression
+---*/
+
+//CHECK#1
+var x=function f1(){return 1;}();
+if(x!==1)
+  throw new Test262Error('#1: Create function dynamically either by using a FunctionExpression');
+
+//CHECK#2
+var y=function  (){return 2;}();
+if(y!==2){
+  throw new Test262Error('#2: Create an anonymous function dynamically either by using a FunctionExpression');
+}
+
+//CHECK#2
+var z = (function(){return 3;})();
+if(z!==3){
+  throw new Test262Error('#3: Create an anonymous function dynamically either by using a FunctionExpression wrapped in a group operator');
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/arguments-with-arguments-fn.js b/js/src/tests/test262/language/expressions/function/arguments-with-arguments-fn.js
new file mode 100644
index 0000000000..560c24c4f8
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/arguments-with-arguments-fn.js
@@ -0,0 +1,32 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-functiondeclarationinstantiation
+es6id: 9.2.12
+description: >
+  Arguments object is created even when the body contains a lexically-scoped
+  binding named "arguments"
+info: |
+  [...]
+  19. Else if "arguments" is an element of parameterNames, then
+      a. Let argumentsObjectNeeded be false.
+  20. Else if hasParameterExpressions is false, then
+      a. If "arguments" is an element of functionNames or if "arguments" is an
+         element of lexicalNames, then
+         i. Let argumentsObjectNeeded be false.
+  [...]
+flags: [noStrict]
+---*/
+
+var args;
+
+var f = function(x = args = arguments) {
+  function arguments() {}
+};
+
+f();
+
+assert.sameValue(typeof args, 'object');
+assert.sameValue(args.length, 0);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/arguments-with-arguments-lex.js b/js/src/tests/test262/language/expressions/function/arguments-with-arguments-lex.js
new file mode 100644
index 0000000000..4b5d0f083f
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/arguments-with-arguments-lex.js
@@ -0,0 +1,32 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-functiondeclarationinstantiation
+es6id: 9.2.12
+description: >
+  Arguments object is created even when the body contains a function named
+  "arguments"
+info: |
+  [...]
+  19. Else if "arguments" is an element of parameterNames, then
+      a. Let argumentsObjectNeeded be false.
+  20. Else if hasParameterExpressions is false, then
+      a. If "arguments" is an element of functionNames or if "arguments" is an
+         element of lexicalNames, then
+         i. Let argumentsObjectNeeded be false.
+  [...]
+flags: [noStrict]
+---*/
+
+var args;
+
+var f = function (x = args = arguments) {
+  let arguments;
+};
+
+f();
+
+assert.sameValue(typeof args, 'object');
+assert.sameValue(args.length, 0);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/array-destructuring-param-strict-body.js b/js/src/tests/test262/language/expressions/function/array-destructuring-param-strict-body.js
new file mode 100644
index 0000000000..6d667c8c86
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/array-destructuring-param-strict-body.js
@@ -0,0 +1,133 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/function-forms/array-destructuring-param-strict-body.case
+// - src/function-forms/syntax/func-expr.template
+/*---
+description: ArrayBindingPattern and Use Strict Directive are not allowed to coexist for the same function. (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [rest-parameters]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.4 Static Semantics: IsSimpleParameterList
+
+    BindingElement : BindingPattern
+
+    1. Return false.
+
+    14.1.2 Static Semantics: Early Errors
+
+    FunctionDeclaration : function BindingIdentifier ( FormalParameters ) { FunctionBody }
+    FunctionDeclaration : function ( FormalParameters ) { FunctionBody }
+    FunctionExpression : function BindingIdentifier ( FormalParameters ) { FunctionBody }
+
+    - It is a Syntax Error if ContainsUseStrict of FunctionBody is true and
+      IsSimpleParameterList of FormalParameters is false.
+
+    14.2.1 Static Semantics: Early Errors
+
+    ArrowFunction : ArrowParameters => ConciseBody
+
+    - It is a Syntax Error if ContainsUseStrict of ConciseBody is true and
+      IsSimpleParameterList of ArrowParameters is false.
+
+    14.3.1 Static Semantics: Early Errors
+
+    MethodDefinition : PropertyName ( UniqueFormalParameters ) { FunctionBody }
+
+    - It is a Syntax Error if ContainsUseStrict of FunctionBody is true and
+      IsSimpleParameterList of UniqueFormalParameters is false.
+
+    MethodDefinition : set PropertyName ( PropertySetParameterList ) { FunctionBody }
+
+    - It is a Syntax Error if ContainsUseStrict of FunctionBody is true and
+      IsSimpleParameterList of PropertySetParameterList is false.
+
+    14.4.1 Static Semantics: Early Errors
+
+    GeneratorMethod : * PropertyName ( UniqueFormalParameters ) { GeneratorBody }
+
+    - It is a Syntax Error if ContainsUseStrict of GeneratorBody is true and
+      IsSimpleParameterList of UniqueFormalParameters is false.
+
+    GeneratorDeclaration : function * BindingIdentifier ( FormalParameters ) { GeneratorBody }
+    GeneratorDeclaration : function * ( FormalParameters ) { GeneratorBody }
+    GeneratorExpression : function * BindingIdentifier ( FormalParameters ) { GeneratorBody }
+
+    - It is a Syntax Error if ContainsUseStrict of GeneratorBody is true and
+      IsSimpleParameterList of UniqueFormalParameters is false.
+
+    14.5.1 Static Semantics: Early Errors
+
+    AsyncGeneratorMethod : async * PropertyName ( UniqueFormalParameters ) { AsyncGeneratorBody }
+
+    - It is a Syntax Error if ContainsUseStrict of AsyncGeneratorBody is true and
+      IsSimpleParameterList of UniqueFormalParameters is false.
+
+    AsyncGeneratorDeclaration : async function * BindingIdentifier ( FormalParameters ) { AsyncGeneratorBody }
+    AsyncGeneratorDeclaration : async function * ( FormalParameters ) { AsyncGeneratorBody }
+    AsyncGeneratorExpression : async function * BindingIdentifier ( FormalParameters ) { AsyncGeneratorBody }
+
+    - It is a Syntax Error if ContainsUseStrict of AsyncGeneratorBody is true and
+      IsSimpleParameterList of FormalParameters is false.
+
+    14.7.1 Static Semantics: Early Errors
+
+    AsyncMethod : async PropertyName ( UniqueFormalParameters ) { AsyncFunctionBody }
+
+    - It is a Syntax Error if ContainsUseStrict of AsyncFunctionBody is true and
+      IsSimpleParameterList of UniqueFormalParameters is false.
+
+    AsyncFunctionDeclaration : async function BindingIdentifier ( FormalParameters ) { AsyncFunctionBody }
+    AsyncFunctionDeclaration : async function ( FormalParameters ) { AsyncFunctionBody }
+    AsyncFunctionExpression : async function ( FormalParameters ) { AsyncFunctionBody }
+    AsyncFunctionExpression : async function BindingIdentifier ( FormalParameters ) { AsyncFunctionBody }
+
+    - It is a Syntax Error if ContainsUseStrict of AsyncFunctionBody is true and
+      IsSimpleParameterList of FormalParameters is false.
+
+    14.8.1 Static Semantics: Early Errors
+
+    AsyncArrowFunction : CoverCallExpressionAndAsyncArrowHead => AsyncConciseBody
+
+    - It is a Syntax Error if ContainsUseStrict of AsyncConciseBody is true and
+      IsSimpleParameterList of CoverCallExpressionAndAsyncArrowHead is false.
+
+---*/
+$DONOTEVALUATE();
+
+0, function([element]) {
+  "use strict";
+};
diff --git a/js/src/tests/test262/language/expressions/function/browser.js b/js/src/tests/test262/language/expressions/function/browser.js
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/browser.js
diff --git a/js/src/tests/test262/language/expressions/function/dflt-params-abrupt.js b/js/src/tests/test262/language/expressions/function/dflt-params-abrupt.js
new file mode 100644
index 0000000000..5660ab125d
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dflt-params-abrupt.js
@@ -0,0 +1,64 @@
+// This file was procedurally generated from the following sources:
+// - src/function-forms/dflt-params-abrupt.case
+// - src/function-forms/error/func-expr.template
+/*---
+description: Abrupt completion returned by evaluation of initializer (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    14.1.19 Runtime Semantics: IteratorBindingInitialization
+
+    FormalsList : FormalsList , FormalParameter
+
+    1. Let status be the result of performing IteratorBindingInitialization for
+       FormalsList using iteratorRecord and environment as the arguments.
+    2. ReturnIfAbrupt(status).
+    3. Return the result of performing IteratorBindingInitialization for
+       FormalParameter using iteratorRecord and environment as the arguments.
+
+---*/
+
+var callCount = 0;
+var f;
+f = function(_ = (function() { throw new Test262Error(); }())) {
+  
+  callCount = callCount + 1;
+};
+
+assert.throws(Test262Error, function() {
+  f();
+});
+assert.sameValue(callCount, 0, 'function body not evaluated');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dflt-params-arg-val-not-undefined.js b/js/src/tests/test262/language/expressions/function/dflt-params-arg-val-not-undefined.js
new file mode 100644
index 0000000000..bf5a756bfb
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dflt-params-arg-val-not-undefined.js
@@ -0,0 +1,87 @@
+// This file was procedurally generated from the following sources:
+// - src/function-forms/dflt-params-arg-val-not-undefined.case
+// - src/function-forms/default/func-expr.template
+/*---
+description: Use of initializer when argument value is not `undefined` (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    14.1.19 Runtime Semantics: IteratorBindingInitialization
+
+    FormalsList : FormalsList , FormalParameter
+
+    [...]
+    23. Let iteratorRecord be Record {[[Iterator]]:
+        CreateListIterator(argumentsList), [[Done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        a. Perform ? IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+---*/
+var obj = {};
+var falseCount = 0;
+var stringCount = 0;
+var nanCount = 0;
+var zeroCount = 0;
+var nullCount = 0;
+var objCount = 0;
+
+var callCount = 0;
+// Stores a reference `ref` for case evaluation
+var ref;
+ref = function(aFalse = falseCount +=1, aString = stringCount += 1, aNaN = nanCount += 1, a0 = zeroCount += 1, aNull = nullCount += 1, aObj = objCount +=1) {
+  assert.sameValue(aFalse, false);
+  assert.sameValue(aString, '');
+  assert.sameValue(aNaN, NaN);
+  assert.sameValue(a0, 0);
+  assert.sameValue(aNull, null);
+  assert.sameValue(aObj, obj);
+  callCount = callCount + 1;
+};
+
+ref(false, '', NaN, 0, null, obj);
+
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+assert.sameValue(falseCount, 0, 'initializer not evaluated: false');
+assert.sameValue(stringCount, 0, 'initializer not evaluated: string');
+assert.sameValue(nanCount, 0, 'initializer not evaluated: NaN');
+assert.sameValue(zeroCount, 0, 'initializer not evaluated: 0');
+assert.sameValue(nullCount, 0, 'initializer not evaluated: null');
+assert.sameValue(objCount, 0, 'initializer not evaluated: object');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dflt-params-arg-val-undefined.js b/js/src/tests/test262/language/expressions/function/dflt-params-arg-val-undefined.js
new file mode 100644
index 0000000000..ed533c291f
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dflt-params-arg-val-undefined.js
@@ -0,0 +1,70 @@
+// This file was procedurally generated from the following sources:
+// - src/function-forms/dflt-params-arg-val-undefined.case
+// - src/function-forms/default/func-expr.template
+/*---
+description: Use of initializer when argument value is `undefined` (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    14.1.19 Runtime Semantics: IteratorBindingInitialization
+
+    FormalsList : FormalsList , FormalParameter
+
+    [...]
+    23. Let iteratorRecord be Record {[[Iterator]]:
+        CreateListIterator(argumentsList), [[Done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        a. Perform ? IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+---*/
+
+var callCount = 0;
+// Stores a reference `ref` for case evaluation
+var ref;
+ref = function(fromLiteral = 23, fromExpr = 45, fromHole = 99) {
+  assert.sameValue(fromLiteral, 23);
+  assert.sameValue(fromExpr, 45);
+  assert.sameValue(fromHole, 99);
+  callCount = callCount + 1;
+};
+
+ref(undefined, void 0);
+
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dflt-params-duplicates.js b/js/src/tests/test262/language/expressions/function/dflt-params-duplicates.js
new file mode 100644
index 0000000000..0c10a35d7e
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dflt-params-duplicates.js
@@ -0,0 +1,62 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/function-forms/dflt-params-duplicates.case
+// - src/function-forms/syntax/func-expr.template
+/*---
+description: It is a Syntax Error if BoundNames of FormalParameters contains any duplicate elements. (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [default-parameters]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    14.1.2 Static Semantics: Early Errors
+
+    StrictFormalParameters : FormalParameters
+
+    - It is a Syntax Error if BoundNames of FormalParameters contains any
+      duplicate elements.
+
+    FormalParameters : FormalParameterList
+
+    - It is a Syntax Error if IsSimpleParameterList of FormalParameterList is
+      false and BoundNames of FormalParameterList contains any duplicate
+      elements.
+
+---*/
+$DONOTEVALUATE();
+
+0, function(x = 0, x) {
+  
+};
diff --git a/js/src/tests/test262/language/expressions/function/dflt-params-ref-later.js b/js/src/tests/test262/language/expressions/function/dflt-params-ref-later.js
new file mode 100644
index 0000000000..99487a3309
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dflt-params-ref-later.js
@@ -0,0 +1,65 @@
+// This file was procedurally generated from the following sources:
+// - src/function-forms/dflt-params-ref-later.case
+// - src/function-forms/error/func-expr.template
+/*---
+description: Referencing a parameter that occurs later in the ParameterList (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    14.1.19 Runtime Semantics: IteratorBindingInitialization
+
+    FormalsList : FormalsList , FormalParameter
+
+    1. Let status be the result of performing IteratorBindingInitialization for
+       FormalsList using iteratorRecord and environment as the arguments.
+    2. ReturnIfAbrupt(status).
+    3. Return the result of performing IteratorBindingInitialization for
+       FormalParameter using iteratorRecord and environment as the arguments.
+
+---*/
+var x = 0;
+
+var callCount = 0;
+var f;
+f = function(x = y, y) {
+  
+  callCount = callCount + 1;
+};
+
+assert.throws(ReferenceError, function() {
+  f();
+});
+assert.sameValue(callCount, 0, 'function body not evaluated');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dflt-params-ref-prior.js b/js/src/tests/test262/language/expressions/function/dflt-params-ref-prior.js
new file mode 100644
index 0000000000..e9a86c1d58
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dflt-params-ref-prior.js
@@ -0,0 +1,67 @@
+// This file was procedurally generated from the following sources:
+// - src/function-forms/dflt-params-ref-prior.case
+// - src/function-forms/default/func-expr.template
+/*---
+description: Referencing a parameter that occurs earlier in the ParameterList (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    14.1.19 Runtime Semantics: IteratorBindingInitialization
+
+    FormalsList : FormalsList , FormalParameter
+
+    1. Let status be the result of performing IteratorBindingInitialization for
+       FormalsList using iteratorRecord and environment as the arguments.
+    2. ReturnIfAbrupt(status).
+    3. Return the result of performing IteratorBindingInitialization for
+       FormalParameter using iteratorRecord and environment as the arguments.
+
+---*/
+var x = 0;
+
+var callCount = 0;
+// Stores a reference `ref` for case evaluation
+var ref;
+ref = function(x, y = x, z = y) {
+  assert.sameValue(x, 3, 'first argument value');
+  assert.sameValue(y, 3, 'second argument value');
+  assert.sameValue(z, 3, 'third argument value');
+  callCount = callCount + 1;
+};
+
+ref(3);
+
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dflt-params-ref-self.js b/js/src/tests/test262/language/expressions/function/dflt-params-ref-self.js
new file mode 100644
index 0000000000..dc35c51de9
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dflt-params-ref-self.js
@@ -0,0 +1,65 @@
+// This file was procedurally generated from the following sources:
+// - src/function-forms/dflt-params-ref-self.case
+// - src/function-forms/error/func-expr.template
+/*---
+description: Referencing a parameter from within its own initializer (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    14.1.19 Runtime Semantics: IteratorBindingInitialization
+
+    FormalsList : FormalsList , FormalParameter
+
+    1. Let status be the result of performing IteratorBindingInitialization for
+       FormalsList using iteratorRecord and environment as the arguments.
+    2. ReturnIfAbrupt(status).
+    3. Return the result of performing IteratorBindingInitialization for
+       FormalParameter using iteratorRecord and environment as the arguments.
+
+---*/
+var x = 0;
+
+var callCount = 0;
+var f;
+f = function(x = x) {
+  
+  callCount = callCount + 1;
+};
+
+assert.throws(ReferenceError, function() {
+  f();
+});
+assert.sameValue(callCount, 0, 'function body not evaluated');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dflt-params-rest.js b/js/src/tests/test262/language/expressions/function/dflt-params-rest.js
new file mode 100644
index 0000000000..faed07a84d
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dflt-params-rest.js
@@ -0,0 +1,66 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/function-forms/dflt-params-rest.case
+// - src/function-forms/syntax/func-expr.template
+/*---
+description: RestParameter does not support an initializer (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [default-parameters]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    14.1 Function Definitions
+
+    Syntax
+
+    FunctionRestParameter[Yield] :
+
+      BindingRestElement[?Yield]
+
+    13.3.3 Destructuring Binding Patterns
+
+    Syntax
+
+    BindingRestElement[Yield] :
+
+      ...BindingIdentifier[?Yield]
+      ...BindingPattern[?Yield]
+
+---*/
+$DONOTEVALUATE();
+
+0, function(...x = []) {
+  
+};
diff --git a/js/src/tests/test262/language/expressions/function/dflt-params-trailing-comma.js b/js/src/tests/test262/language/expressions/function/dflt-params-trailing-comma.js
new file mode 100644
index 0000000000..275cb6745f
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dflt-params-trailing-comma.js
@@ -0,0 +1,61 @@
+// This file was procedurally generated from the following sources:
+// - src/function-forms/dflt-params-trailing-comma.case
+// - src/function-forms/default/func-expr.template
+/*---
+description: A trailing comma should not increase the respective length, using default parameters (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    Trailing comma in the parameters list
+
+    14.1 Function Definitions
+
+    FormalParameters[Yield, Await] : FormalParameterList[?Yield, ?Await] ,
+---*/
+
+var callCount = 0;
+// Stores a reference `ref` for case evaluation
+var ref;
+ref = function(a, b = 39,) {
+  assert.sameValue(a, 42);
+  assert.sameValue(b, 39);
+  callCount = callCount + 1;
+};
+
+ref(42, undefined, 1);
+
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+assert.sameValue(ref.length, 1, 'length is properly set');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/ary-init-iter-close.js b/js/src/tests/test262/language/expressions/function/dstr/ary-init-iter-close.js
new file mode 100644
index 0000000000..ef9cd5e1fa
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/ary-init-iter-close.js
@@ -0,0 +1,74 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-init-iter-close.case
+// - src/dstr-binding/default/func-expr.template
+/*---
+description: Iterator is closed when not exhausted by pattern evaluation (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [Symbol.iterator, destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.5 Runtime Semantics: BindingInitialization
+
+    BindingPattern : ArrayBindingPattern
+
+    [...]
+    4. If iteratorRecord.[[done]] is false, return ? IteratorClose(iterator,
+       result).
+    [...]
+
+---*/
+var doneCallCount = 0;
+var iter = {};
+iter[Symbol.iterator] = function() {
+  return {
+    next: function() {
+      return { value: null, done: false };
+    },
+    return: function() {
+      doneCallCount += 1;
+      return {};
+    }
+  };
+};
+
+var callCount = 0;
+var f;
+f = function([x]) {
+  assert.sameValue(doneCallCount, 1);
+  callCount = callCount + 1;
+};
+
+f(iter);
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/ary-init-iter-get-err-array-prototype.js b/js/src/tests/test262/language/expressions/function/dstr/ary-init-iter-get-err-array-prototype.js
new file mode 100644
index 0000000000..413a4afa13
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/ary-init-iter-get-err-array-prototype.js
@@ -0,0 +1,65 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-init-iter-get-err-array-prototype.case
+// - src/dstr-binding/error/func-expr.template
+/*---
+description: Abrupt completion returned by GetIterator (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [Symbol.iterator, destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    Runtime Semantics: BindingInitialization
+
+    BindingPattern : ArrayBindingPattern
+
+    1. Let iteratorRecord be ? GetIterator(value).
+
+    GetIterator ( obj [ , hint [ , method ] ] )
+
+    [...]
+    4. Let iterator be ? Call(method, obj).
+
+    Call ( F, V [ , argumentsList ] )
+
+    [...]
+    2. If IsCallable(F) is false, throw a TypeError exception.
+
+---*/
+delete Array.prototype[Symbol.iterator];
+
+var f = function([x, y, z]) {};
+
+assert.throws(TypeError, function() {
+  f([1, 2, 3]);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/ary-init-iter-get-err.js b/js/src/tests/test262/language/expressions/function/dstr/ary-init-iter-get-err.js
new file mode 100644
index 0000000000..f286cb6592
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/ary-init-iter-get-err.js
@@ -0,0 +1,59 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-init-iter-get-err.case
+// - src/dstr-binding/error/func-expr.template
+/*---
+description: Abrupt completion returned by GetIterator (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [Symbol.iterator, destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.5 Runtime Semantics: BindingInitialization
+
+    BindingPattern : ArrayBindingPattern
+
+    1. Let iterator be GetIterator(value).
+    2. ReturnIfAbrupt(iterator).
+
+---*/
+var iter = {};
+iter[Symbol.iterator] = function() {
+  throw new Test262Error();
+};
+
+var f = function([x]) {};
+
+assert.throws(Test262Error, function() {
+  f(iter);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/ary-init-iter-no-close.js b/js/src/tests/test262/language/expressions/function/dstr/ary-init-iter-no-close.js
new file mode 100644
index 0000000000..c0db91a6f5
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/ary-init-iter-no-close.js
@@ -0,0 +1,74 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-init-iter-no-close.case
+// - src/dstr-binding/default/func-expr.template
+/*---
+description: Iterator is not closed when exhausted by pattern evaluation (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [Symbol.iterator, destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.5 Runtime Semantics: BindingInitialization
+
+    BindingPattern : ArrayBindingPattern
+
+    [...]
+    4. If iteratorRecord.[[done]] is false, return ? IteratorClose(iterator,
+       result).
+    [...]
+
+---*/
+var doneCallCount = 0;
+var iter = {};
+iter[Symbol.iterator] = function() {
+  return {
+    next: function() {
+      return { value: null, done: true };
+    },
+    return: function() {
+      doneCallCount += 1;
+      return {};
+    }
+  };
+};
+
+var callCount = 0;
+var f;
+f = function([x]) {
+  assert.sameValue(doneCallCount, 0);
+  callCount = callCount + 1;
+};
+
+f(iter);
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/ary-name-iter-val.js b/js/src/tests/test262/language/expressions/function/dstr/ary-name-iter-val.js
new file mode 100644
index 0000000000..0fdfb289ce
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/ary-name-iter-val.js
@@ -0,0 +1,73 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-name-iter-val.case
+// - src/dstr-binding/default/func-expr.template
+/*---
+description: SingleNameBinding with normal value iteration (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    SingleNameBinding : BindingIdentifier Initializeropt
+
+    [...]
+    4. If iteratorRecord.[[done]] is false, then
+       a. Let next be IteratorStep(iteratorRecord.[[iterator]]).
+       b. If next is an abrupt completion, set iteratorRecord.[[done]] to true.
+       c. ReturnIfAbrupt(next).
+       d. If next is false, set iteratorRecord.[[done]] to true.
+       e. Else,
+          [...]
+          i. Let v be IteratorValue(next).
+          ii. If v is an abrupt completion, set
+              iteratorRecord.[[done]] to true.
+          iii. ReturnIfAbrupt(v).
+    5. If iteratorRecord.[[done]] is true, let v be undefined.
+    [...]
+    8. Return InitializeReferencedBinding(lhs, v).
+---*/
+
+var callCount = 0;
+var f;
+f = function([x, y, z]) {
+  assert.sameValue(x, 1);
+  assert.sameValue(y, 2);
+  assert.sameValue(z, 3);
+  callCount = callCount + 1;
+};
+
+f([1, 2, 3]);
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-ary-elem-init.js b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-ary-elem-init.js
new file mode 100644
index 0000000000..cf0aef0802
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-ary-elem-init.js
@@ -0,0 +1,65 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elem-ary-elem-init.case
+// - src/dstr-binding/default/func-expr.template
+/*---
+description: BindingElement with array binding pattern and initializer is used (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    BindingElement : BindingPatternInitializer opt
+
+    [...]
+    2. If iteratorRecord.[[done]] is true, let v be undefined.
+    3. If Initializer is present and v is undefined, then
+       a. Let defaultValue be the result of evaluating Initializer.
+       b. Let v be ? GetValue(defaultValue).
+    4. Return the result of performing BindingInitialization of BindingPattern
+       with v and environment as the arguments.
+---*/
+
+var callCount = 0;
+var f;
+f = function([[x, y, z] = [4, 5, 6]]) {
+  assert.sameValue(x, 4);
+  assert.sameValue(y, 5);
+  assert.sameValue(z, 6);
+  callCount = callCount + 1;
+};
+
+f([]);
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-ary-elem-iter.js b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-ary-elem-iter.js
new file mode 100644
index 0000000000..19c1d07954
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-ary-elem-iter.js
@@ -0,0 +1,66 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elem-ary-elem-iter.case
+// - src/dstr-binding/default/func-expr.template
+/*---
+description: BindingElement with array binding pattern and initializer is not used (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    BindingElement : BindingPatternInitializer opt
+
+    1. If iteratorRecord.[[done]] is false, then
+       a. Let next be IteratorStep(iteratorRecord.[[iterator]]).
+       [...]
+       e. Else,
+          i. Let v be IteratorValue(next).
+          [...]
+    4. Return the result of performing BindingInitialization of BindingPattern
+       with v and environment as the arguments.
+---*/
+
+var callCount = 0;
+var f;
+f = function([[x, y, z] = [4, 5, 6]]) {
+  assert.sameValue(x, 7);
+  assert.sameValue(y, 8);
+  assert.sameValue(z, 9);
+  callCount = callCount + 1;
+};
+
+f([[7, 8, 9]]);
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-ary-elision-init.js b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-ary-elision-init.js
new file mode 100644
index 0000000000..454db5252e
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-ary-elision-init.js
@@ -0,0 +1,72 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elem-ary-elision-init.case
+// - src/dstr-binding/default/func-expr.template
+/*---
+description: BindingElement with array binding pattern and initializer is used (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [generators, destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    BindingElement : BindingPatternInitializer opt
+
+    [...]
+    2. If iteratorRecord.[[done]] is true, let v be undefined.
+    3. If Initializer is present and v is undefined, then
+       a. Let defaultValue be the result of evaluating Initializer.
+       b. Let v be ? GetValue(defaultValue).
+    4. Return the result of performing BindingInitialization of BindingPattern
+       with v and environment as the arguments.
+
+---*/
+var first = 0;
+var second = 0;
+function* g() {
+  first += 1;
+  yield;
+  second += 1;
+};
+
+var callCount = 0;
+var f;
+f = function([[,] = g()]) {
+  assert.sameValue(first, 1);
+  assert.sameValue(second, 0);
+  callCount = callCount + 1;
+};
+
+f([]);
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-ary-elision-iter.js b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-ary-elision-iter.js
new file mode 100644
index 0000000000..e2450a165b
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-ary-elision-iter.js
@@ -0,0 +1,69 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elem-ary-elision-iter.case
+// - src/dstr-binding/default/func-expr.template
+/*---
+description: BindingElement with array binding pattern and initializer is not used (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [generators, destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    BindingElement : BindingPatternInitializer opt
+
+    1. If iteratorRecord.[[done]] is false, then
+       a. Let next be IteratorStep(iteratorRecord.[[iterator]]).
+       [...]
+       e. Else,
+          i. Let v be IteratorValue(next).
+          [...]
+    4. Return the result of performing BindingInitialization of BindingPattern
+       with v and environment as the arguments.
+
+---*/
+var callCount = 0;
+function* g() {
+  callCount += 1;
+};
+
+var callCount = 0;
+var f;
+f = function([[,] = g()]) {
+  assert.sameValue(callCount, 0);
+  callCount = callCount + 1;
+};
+
+f([[]]);
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-ary-empty-init.js b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-ary-empty-init.js
new file mode 100644
index 0000000000..1401ae634b
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-ary-empty-init.js
@@ -0,0 +1,68 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elem-ary-empty-init.case
+// - src/dstr-binding/default/func-expr.template
+/*---
+description: BindingElement with array binding pattern and initializer is used (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [generators, destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    BindingElement : BindingPatternInitializer opt
+
+    [...]
+    2. If iteratorRecord.[[done]] is true, let v be undefined.
+    3. If Initializer is present and v is undefined, then
+       a. Let defaultValue be the result of evaluating Initializer.
+       b. Let v be ? GetValue(defaultValue).
+    4. Return the result of performing BindingInitialization of BindingPattern
+       with v and environment as the arguments.
+
+---*/
+var initCount = 0;
+var iterCount = 0;
+var iter = function*() { iterCount += 1; }();
+
+var callCount = 0;
+var f;
+f = function([[] = function() { initCount += 1; return iter; }()]) {
+  assert.sameValue(initCount, 1);
+  assert.sameValue(iterCount, 0);
+  callCount = callCount + 1;
+};
+
+f([]);
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-ary-empty-iter.js b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-ary-empty-iter.js
new file mode 100644
index 0000000000..41141e6a47
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-ary-empty-iter.js
@@ -0,0 +1,65 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elem-ary-empty-iter.case
+// - src/dstr-binding/default/func-expr.template
+/*---
+description: BindingElement with array binding pattern and initializer is not used (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    BindingElement : BindingPatternInitializer opt
+
+    1. If iteratorRecord.[[done]] is false, then
+       a. Let next be IteratorStep(iteratorRecord.[[iterator]]).
+       [...]
+       e. Else,
+          i. Let v be IteratorValue(next).
+          [...]
+    4. Return the result of performing BindingInitialization of BindingPattern
+       with v and environment as the arguments.
+---*/
+var initCount = 0;
+
+var callCount = 0;
+var f;
+f = function([[] = function() { initCount += 1; }()]) {
+  assert.sameValue(initCount, 0);
+  callCount = callCount + 1;
+};
+
+f([[23]]);
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-ary-rest-init.js b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-ary-rest-init.js
new file mode 100644
index 0000000000..344413a860
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-ary-rest-init.js
@@ -0,0 +1,69 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elem-ary-rest-init.case
+// - src/dstr-binding/default/func-expr.template
+/*---
+description: BindingElement with array binding pattern and initializer is used (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    BindingElement : BindingPatternInitializer opt
+
+    [...]
+    2. If iteratorRecord.[[done]] is true, let v be undefined.
+    3. If Initializer is present and v is undefined, then
+       a. Let defaultValue be the result of evaluating Initializer.
+       b. Let v be ? GetValue(defaultValue).
+    4. Return the result of performing BindingInitialization of BindingPattern
+       with v and environment as the arguments.
+---*/
+var values = [2, 1, 3];
+
+var callCount = 0;
+var f;
+f = function([[...x] = values]) {
+  assert(Array.isArray(x));
+  assert.sameValue(x[0], 2);
+  assert.sameValue(x[1], 1);
+  assert.sameValue(x[2], 3);
+  assert.sameValue(x.length, 3);
+  assert.notSameValue(x, values);
+  callCount = callCount + 1;
+};
+
+f([]);
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-ary-rest-iter.js b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-ary-rest-iter.js
new file mode 100644
index 0000000000..19ddb663f0
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-ary-rest-iter.js
@@ -0,0 +1,72 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elem-ary-rest-iter.case
+// - src/dstr-binding/default/func-expr.template
+/*---
+description: BindingElement with array binding pattern and initializer is not used (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    BindingElement : BindingPatternInitializer opt
+
+    1. If iteratorRecord.[[done]] is false, then
+       a. Let next be IteratorStep(iteratorRecord.[[iterator]]).
+       [...]
+       e. Else,
+          i. Let v be IteratorValue(next).
+          [...]
+    4. Return the result of performing BindingInitialization of BindingPattern
+       with v and environment as the arguments.
+---*/
+var values = [2, 1, 3];
+var initCount = 0;
+
+var callCount = 0;
+var f;
+f = function([[...x] = function() { initCount += 1; }()]) {
+  assert(Array.isArray(x));
+  assert.sameValue(x[0], 2);
+  assert.sameValue(x[1], 1);
+  assert.sameValue(x[2], 3);
+  assert.sameValue(x.length, 3);
+  assert.notSameValue(x, values);
+  assert.sameValue(initCount, 0);
+  callCount = callCount + 1;
+};
+
+f([values]);
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-ary-val-null.js b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-ary-val-null.js
new file mode 100644
index 0000000000..1314c9664f
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-ary-val-null.js
@@ -0,0 +1,66 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elem-ary-val-null.case
+// - src/dstr-binding/error/func-expr.template
+/*---
+description: Nested array destructuring with a null value (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    BindingElement : BindingPattern Initializeropt
+
+    1. If iteratorRecord.[[done]] is false, then
+       [...]
+       e. Else
+          i. Let v be IteratorValue(next).
+          [...]
+    4. Return the result of performing BindingInitialization of BindingPattern
+       with v and environment as the arguments.
+
+    13.3.3.5 Runtime Semantics: BindingInitialization
+
+    BindingPattern : ArrayBindingPattern
+
+    1. Let iterator be GetIterator(value).
+    2. ReturnIfAbrupt(iterator).
+---*/
+
+var f = function([[x]]) {};
+
+assert.throws(TypeError, function() {
+  f([null]);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-id-init-exhausted.js b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-id-init-exhausted.js
new file mode 100644
index 0000000000..733d89fe4e
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-id-init-exhausted.js
@@ -0,0 +1,64 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elem-id-init-exhausted.case
+// - src/dstr-binding/default/func-expr.template
+/*---
+description: Destructuring initializer with an exhausted iterator (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    SingleNameBinding : BindingIdentifier Initializeropt
+
+    [...]
+    5. If iteratorRecord.[[done]] is true, let v be undefined.
+    6. If Initializer is present and v is undefined, then
+       a. Let defaultValue be the result of evaluating Initializer.
+       b. Let v be GetValue(defaultValue).
+       [...]
+    7. If environment is undefined, return PutValue(lhs, v).
+    8. Return InitializeReferencedBinding(lhs, v).
+---*/
+
+var callCount = 0;
+var f;
+f = function([x = 23]) {
+  assert.sameValue(x, 23);
+  callCount = callCount + 1;
+};
+
+f([]);
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-id-init-fn-name-arrow.js b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-id-init-fn-name-arrow.js
new file mode 100644
index 0000000000..8e3e750011
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-id-init-fn-name-arrow.js
@@ -0,0 +1,65 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elem-id-init-fn-name-arrow.case
+// - src/dstr-binding/default/func-expr.template
+/*---
+description: SingleNameBinding does assign name to arrow functions (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    SingleNameBinding : BindingIdentifier Initializeropt
+
+    [...]
+    6. If Initializer is present and v is undefined, then
+       a. Let defaultValue be the result of evaluating Initializer.
+       b. Let v be GetValue(defaultValue).
+       c. ReturnIfAbrupt(v).
+       d. If IsAnonymousFunctionDefinition(Initializer) is true, then
+          [...]
+    7. If environment is undefined, return PutValue(lhs, v).
+    8. Return InitializeReferencedBinding(lhs, v).
+---*/
+
+var callCount = 0;
+var f;
+f = function([arrow = () => {}]) {
+  assert.sameValue(arrow.name, 'arrow');
+  callCount = callCount + 1;
+};
+
+f([]);
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-id-init-fn-name-class.js b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-id-init-fn-name-class.js
new file mode 100644
index 0000000000..315d4c8538
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-id-init-fn-name-class.js
@@ -0,0 +1,67 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elem-id-init-fn-name-class.case
+// - src/dstr-binding/default/func-expr.template
+/*---
+description: SingleNameBinding assigns `name` to "anonymous" classes (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    SingleNameBinding : BindingIdentifier Initializeropt
+
+    [...]
+    6. If Initializer is present and v is undefined, then
+       a. Let defaultValue be the result of evaluating Initializer.
+       b. Let v be GetValue(defaultValue).
+       c. ReturnIfAbrupt(v).
+       d. If IsAnonymousFunctionDefinition(Initializer) is true, then
+          [...]
+    7. If environment is undefined, return PutValue(lhs, v).
+    8. Return InitializeReferencedBinding(lhs, v).
+---*/
+
+var callCount = 0;
+var f;
+f = function([cls = class {}, xCls = class X {}, xCls2 = class { static name() {} }]) {
+  assert.sameValue(cls.name, 'cls');
+  assert.notSameValue(xCls.name, 'xCls');
+  assert.notSameValue(xCls2.name, 'xCls2');
+  callCount = callCount + 1;
+};
+
+f([]);
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-id-init-fn-name-cover.js b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-id-init-fn-name-cover.js
new file mode 100644
index 0000000000..c7cdb8f3eb
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-id-init-fn-name-cover.js
@@ -0,0 +1,66 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elem-id-init-fn-name-cover.case
+// - src/dstr-binding/default/func-expr.template
+/*---
+description: SingleNameBinding does assign name to "anonymous" functions "through" cover grammar (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    SingleNameBinding : BindingIdentifier Initializeropt
+
+    [...]
+    6. If Initializer is present and v is undefined, then
+       a. Let defaultValue be the result of evaluating Initializer.
+       b. Let v be GetValue(defaultValue).
+       c. ReturnIfAbrupt(v).
+       d. If IsAnonymousFunctionDefinition(Initializer) is true, then
+          [...]
+    7. If environment is undefined, return PutValue(lhs, v).
+    8. Return InitializeReferencedBinding(lhs, v).
+---*/
+
+var callCount = 0;
+var f;
+f = function([cover = (function () {}), xCover = (0, function() {})]) {
+  assert.sameValue(cover.name, 'cover');
+  assert.notSameValue(xCover.name, 'xCover');
+  callCount = callCount + 1;
+};
+
+f([]);
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-id-init-fn-name-fn.js b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-id-init-fn-name-fn.js
new file mode 100644
index 0000000000..22ee936236
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-id-init-fn-name-fn.js
@@ -0,0 +1,66 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elem-id-init-fn-name-fn.case
+// - src/dstr-binding/default/func-expr.template
+/*---
+description: SingleNameBinding assigns name to "anonymous" functions (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    SingleNameBinding : BindingIdentifier Initializeropt
+
+    [...]
+    6. If Initializer is present and v is undefined, then
+       a. Let defaultValue be the result of evaluating Initializer.
+       b. Let v be GetValue(defaultValue).
+       c. ReturnIfAbrupt(v).
+       d. If IsAnonymousFunctionDefinition(Initializer) is true, then
+          [...]
+    7. If environment is undefined, return PutValue(lhs, v).
+    8. Return InitializeReferencedBinding(lhs, v).
+---*/
+
+var callCount = 0;
+var f;
+f = function([fn = function () {}, xFn = function x() {}]) {
+  assert.sameValue(fn.name, 'fn');
+  assert.notSameValue(xFn.name, 'xFn');
+  callCount = callCount + 1;
+};
+
+f([]);
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-id-init-fn-name-gen.js b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-id-init-fn-name-gen.js
new file mode 100644
index 0000000000..c9624b4eec
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-id-init-fn-name-gen.js
@@ -0,0 +1,67 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elem-id-init-fn-name-gen.case
+// - src/dstr-binding/default/func-expr.template
+/*---
+description: SingleNameBinding assigns name to "anonymous" generator functions (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [generators, destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    SingleNameBinding : BindingIdentifier Initializeropt
+
+    [...]
+    6. If Initializer is present and v is undefined, then
+       a. Let defaultValue be the result of evaluating Initializer.
+       b. Let v be GetValue(defaultValue).
+       c. ReturnIfAbrupt(v).
+       d. If IsAnonymousFunctionDefinition(Initializer) is true, then
+          [...]
+    7. If environment is undefined, return PutValue(lhs, v).
+    8. Return InitializeReferencedBinding(lhs, v).
+
+---*/
+
+var callCount = 0;
+var f;
+f = function([gen = function* () {}, xGen = function* x() {}]) {
+  assert.sameValue(gen.name, 'gen');
+  assert.notSameValue(xGen.name, 'xGen');
+  callCount = callCount + 1;
+};
+
+f([]);
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-id-init-hole.js b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-id-init-hole.js
new file mode 100644
index 0000000000..bbbd4daed1
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-id-init-hole.js
@@ -0,0 +1,60 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elem-id-init-hole.case
+// - src/dstr-binding/default/func-expr.template
+/*---
+description: Destructuring initializer with a "hole" (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+    SingleNameBinding : BindingIdentifier Initializeropt
+    [...] 6. If Initializer is present and v is undefined, then
+       a. Let defaultValue be the result of evaluating Initializer.
+       b. Let v be GetValue(defaultValue).
+       [...]
+    7. If environment is undefined, return PutValue(lhs, v). 8. Return InitializeReferencedBinding(lhs, v).
+---*/
+
+var callCount = 0;
+var f;
+f = function([x = 23]) {
+  assert.sameValue(x, 23);
+  // another statement
+  callCount = callCount + 1;
+};
+
+f([,]);
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-id-init-skipped.js b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-id-init-skipped.js
new file mode 100644
index 0000000000..abe552c186
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-id-init-skipped.js
@@ -0,0 +1,69 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elem-id-init-skipped.case
+// - src/dstr-binding/default/func-expr.template
+/*---
+description: Destructuring initializer is not evaluated when value is not `undefined` (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    SingleNameBinding : BindingIdentifier Initializeropt
+
+    [...]
+    6. If Initializer is present and v is undefined, then
+       [...]
+    7. If environment is undefined, return PutValue(lhs, v).
+    8. Return InitializeReferencedBinding(lhs, v).
+---*/
+var initCount = 0;
+function counter() {
+  initCount += 1;
+}
+
+var callCount = 0;
+var f;
+f = function([w = counter(), x = counter(), y = counter(), z = counter()]) {
+  assert.sameValue(w, null);
+  assert.sameValue(x, 0);
+  assert.sameValue(y, false);
+  assert.sameValue(z, '');
+  assert.sameValue(initCount, 0);
+  callCount = callCount + 1;
+};
+
+f([null, 0, false, '']);
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-id-init-throws.js b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-id-init-throws.js
new file mode 100644
index 0000000000..e27197f2e9
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-id-init-throws.js
@@ -0,0 +1,57 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elem-id-init-throws.case
+// - src/dstr-binding/error/func-expr.template
+/*---
+description: Destructuring initializer returns an abrupt completion (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    SingleNameBinding : BindingIdentifier Initializeropt
+
+    [...]
+    6. If Initializer is present and v is undefined, then
+       a. Let defaultValue be the result of evaluating Initializer.
+       b. Let v be GetValue(defaultValue).
+       c. ReturnIfAbrupt(v).
+---*/
+
+var f = function([x = (function() { throw new Test262Error(); })()]) {};
+
+assert.throws(Test262Error, function() {
+  f([undefined]);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-id-init-undef.js b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-id-init-undef.js
new file mode 100644
index 0000000000..a746086945
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-id-init-undef.js
@@ -0,0 +1,63 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elem-id-init-undef.case
+// - src/dstr-binding/default/func-expr.template
+/*---
+description: Destructuring initializer with an undefined value (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    SingleNameBinding : BindingIdentifier Initializeropt
+
+    [...]
+    6. If Initializer is present and v is undefined, then
+       a. Let defaultValue be the result of evaluating Initializer.
+       b. Let v be GetValue(defaultValue).
+       [...]
+    7. If environment is undefined, return PutValue(lhs, v).
+    8. Return InitializeReferencedBinding(lhs, v).
+---*/
+
+var callCount = 0;
+var f;
+f = function([x = 23]) {
+  assert.sameValue(x, 23);
+  callCount = callCount + 1;
+};
+
+f([undefined]);
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-id-init-unresolvable.js b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-id-init-unresolvable.js
new file mode 100644
index 0000000000..f095fdb598
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-id-init-unresolvable.js
@@ -0,0 +1,64 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elem-id-init-unresolvable.case
+// - src/dstr-binding/error/func-expr.template
+/*---
+description: Destructuring initializer is an unresolvable reference (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    SingleNameBinding : BindingIdentifier Initializeropt
+
+    [...]
+    6. If Initializer is present and v is undefined, then
+       a. Let defaultValue be the result of evaluating Initializer.
+       b. Let v be GetValue(defaultValue).
+       c. ReturnIfAbrupt(v).
+
+    6.2.3.1 GetValue (V)
+
+    1. ReturnIfAbrupt(V).
+    2. If Type(V) is not Reference, return V.
+    3. Let base be GetBase(V).
+    4. If IsUnresolvableReference(V), throw a ReferenceError exception.
+---*/
+
+var f = function([ x = unresolvableReference ]) {};
+
+assert.throws(ReferenceError, function() {
+  f([]);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-id-iter-complete.js b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-id-iter-complete.js
new file mode 100644
index 0000000000..6e03774969
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-id-iter-complete.js
@@ -0,0 +1,67 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elem-id-iter-complete.case
+// - src/dstr-binding/default/func-expr.template
+/*---
+description: SingleNameBinding when value iteration completes (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    SingleNameBinding : BindingIdentifier Initializeropt
+
+    [...]
+    4. If iteratorRecord.[[done]] is false, then
+       a. Let next be IteratorStep(iteratorRecord.[[iterator]]).
+       b. If next is an abrupt completion, set iteratorRecord.[[done]] to true.
+       c. ReturnIfAbrupt(next).
+       d. If next is false, set iteratorRecord.[[done]] to true.
+       e. Else,
+          [...]
+    5. If iteratorRecord.[[done]] is true, let v be undefined.
+    [...]
+    8. Return InitializeReferencedBinding(lhs, v).
+---*/
+
+var callCount = 0;
+var f;
+f = function([x]) {
+  assert.sameValue(x, undefined);
+  callCount = callCount + 1;
+};
+
+f([]);
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-id-iter-done.js b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-id-iter-done.js
new file mode 100644
index 0000000000..f95c31ee9a
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-id-iter-done.js
@@ -0,0 +1,62 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elem-id-iter-done.case
+// - src/dstr-binding/default/func-expr.template
+/*---
+description: SingleNameBinding when value iteration was completed previously (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    SingleNameBinding : BindingIdentifier Initializeropt
+
+    [...]
+    4. If iteratorRecord.[[done]] is false, then
+       [...]
+    5. If iteratorRecord.[[done]] is true, let v be undefined.
+    [...]
+    8. Return InitializeReferencedBinding(lhs, v).
+---*/
+
+var callCount = 0;
+var f;
+f = function([_, x]) {
+  assert.sameValue(x, undefined);
+  callCount = callCount + 1;
+};
+
+f([]);
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-id-iter-step-err.js b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-id-iter-step-err.js
new file mode 100644
index 0000000000..d40ff3a244
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-id-iter-step-err.js
@@ -0,0 +1,66 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elem-id-iter-step-err.case
+// - src/dstr-binding/error/func-expr.template
+/*---
+description: Error forwarding when IteratorStep returns an abrupt completion (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [Symbol.iterator, destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    SingleNameBinding : BindingIdentifier Initializeropt
+
+    [...]
+    4. If iteratorRecord.[[done]] is false, then
+       a. Let next be IteratorStep(iteratorRecord.[[iterator]]).
+       b. If next is an abrupt completion, set iteratorRecord.[[done]] to true.
+       c. ReturnIfAbrupt(next).
+
+---*/
+var g = {};
+g[Symbol.iterator] = function() {
+  return {
+    next: function() {
+      throw new Test262Error();
+    }
+  };
+};
+
+var f = function([x]) {};
+
+assert.throws(Test262Error, function() {
+  f(g);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-id-iter-val-array-prototype.js b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-id-iter-val-array-prototype.js
new file mode 100644
index 0000000000..f918ba42ed
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-id-iter-val-array-prototype.js
@@ -0,0 +1,83 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elem-id-iter-val-array-prototype.case
+// - src/dstr-binding/default/func-expr.template
+/*---
+description: Array destructuring uses overriden Array.prototype[Symbol.iterator] (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [Symbol.iterator, generators, destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    Runtime Semantics: IteratorBindingInitialization
+
+    SingleNameBinding : BindingIdentifier Initializer_opt
+
+    1. Let bindingId be StringValue of BindingIdentifier.
+    2. Let lhs be ? ResolveBinding(bindingId, environment).
+    3. If iteratorRecord.[[Done]] is false, then
+        a. Let next be IteratorStep(iteratorRecord).
+        b. If next is an abrupt completion, set iteratorRecord.[[Done]] to true.
+        c. ReturnIfAbrupt(next).
+        d. If next is false, set iteratorRecord.[[Done]] to true.
+        e. Else,
+            i. Let v be IteratorValue(next).
+            ii. If v is an abrupt completion, set iteratorRecord.[[Done]] to true.
+            iii. ReturnIfAbrupt(v).
+    [...]
+    7. Return InitializeReferencedBinding(lhs, v).
+
+---*/
+Array.prototype[Symbol.iterator] = function* () {
+    if (this.length > 0) {
+        yield this[0];
+    }
+    if (this.length > 1) {
+        yield this[1];
+    }
+    if (this.length > 2) {
+        yield 42;
+    }
+};
+
+var callCount = 0;
+var f;
+f = function([x, y, z]) {
+  assert.sameValue(x, 1);
+  assert.sameValue(y, 2);
+  assert.sameValue(z, 42);
+  callCount = callCount + 1;
+};
+
+f([1, 2, 3]);
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-id-iter-val-err.js b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-id-iter-val-err.js
new file mode 100644
index 0000000000..0a960f1b37
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-id-iter-val-err.js
@@ -0,0 +1,77 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elem-id-iter-val-err.case
+// - src/dstr-binding/error/func-expr.template
+/*---
+description: Error forwarding when IteratorValue returns an abrupt completion (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [Symbol.iterator, destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    SingleNameBinding : BindingIdentifier Initializeropt
+
+    [...]
+    4. If iteratorRecord.[[done]] is false, then
+       a. Let next be IteratorStep(iteratorRecord.[[iterator]]).
+       b. If next is an abrupt completion, set iteratorRecord.[[done]] to true.
+       c. ReturnIfAbrupt(next).
+       d. If next is false, set iteratorRecord.[[done]] to true.
+       e. Else,
+          i. Let v be IteratorValue(next).
+          ii. If v is an abrupt completion, set iteratorRecord.[[done]] to
+              true.
+          iii. ReturnIfAbrupt(v).
+
+---*/
+var poisonedValue = Object.defineProperty({}, 'value', {
+  get: function() {
+    throw new Test262Error();
+  }
+});
+var g = {};
+g[Symbol.iterator] = function() {
+  return {
+    next: function() {
+      return poisonedValue;
+    }
+  };
+};
+
+var f = function([x]) {};
+
+assert.throws(Test262Error, function() {
+  f(g);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-id-iter-val.js b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-id-iter-val.js
new file mode 100644
index 0000000000..5ec9c6c814
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-id-iter-val.js
@@ -0,0 +1,73 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elem-id-iter-val.case
+// - src/dstr-binding/default/func-expr.template
+/*---
+description: SingleNameBinding when value iteration was completed previously (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    SingleNameBinding : BindingIdentifier Initializeropt
+
+    [...]
+    4. If iteratorRecord.[[done]] is false, then
+       a. Let next be IteratorStep(iteratorRecord.[[iterator]]).
+       b. If next is an abrupt completion, set iteratorRecord.[[done]] to true.
+       c. ReturnIfAbrupt(next).
+       d. If next is false, set iteratorRecord.[[done]] to true.
+       e. Else,
+          [...]
+          i. Let v be IteratorValue(next).
+          ii. If v is an abrupt completion, set
+              iteratorRecord.[[done]] to true.
+          iii. ReturnIfAbrupt(v).
+    5. If iteratorRecord.[[done]] is true, let v be undefined.
+    [...]
+    8. Return InitializeReferencedBinding(lhs, v).
+---*/
+
+var callCount = 0;
+var f;
+f = function([x, y, z]) {
+  assert.sameValue(x, 1);
+  assert.sameValue(y, 2);
+  assert.sameValue(z, 3);
+  callCount = callCount + 1;
+};
+
+f([1, 2, 3]);
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-obj-id-init.js b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-obj-id-init.js
new file mode 100644
index 0000000000..07bdf9def8
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-obj-id-init.js
@@ -0,0 +1,65 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elem-obj-id-init.case
+// - src/dstr-binding/default/func-expr.template
+/*---
+description: BindingElement with object binding pattern and initializer is used (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    BindingElement : BindingPatternInitializer opt
+
+    [...]
+    2. If iteratorRecord.[[done]] is true, let v be undefined.
+    3. If Initializer is present and v is undefined, then
+       a. Let defaultValue be the result of evaluating Initializer.
+       b. Let v be ? GetValue(defaultValue).
+    4. Return the result of performing BindingInitialization of BindingPattern
+       with v and environment as the arguments.
+---*/
+
+var callCount = 0;
+var f;
+f = function([{ x, y, z } = { x: 44, y: 55, z: 66 }]) {
+  assert.sameValue(x, 44);
+  assert.sameValue(y, 55);
+  assert.sameValue(z, 66);
+  callCount = callCount + 1;
+};
+
+f([]);
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-obj-id.js b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-obj-id.js
new file mode 100644
index 0000000000..b1b3746689
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-obj-id.js
@@ -0,0 +1,65 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elem-obj-id.case
+// - src/dstr-binding/default/func-expr.template
+/*---
+description: BindingElement with object binding pattern and initializer is not used (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    BindingElement : BindingPatternInitializer opt
+
+    [...]
+    2. If iteratorRecord.[[done]] is true, let v be undefined.
+    3. If Initializer is present and v is undefined, then
+       a. Let defaultValue be the result of evaluating Initializer.
+       b. Let v be ? GetValue(defaultValue).
+    4. Return the result of performing BindingInitialization of BindingPattern
+       with v and environment as the arguments.
+---*/
+
+var callCount = 0;
+var f;
+f = function([{ x, y, z } = { x: 44, y: 55, z: 66 }]) {
+  assert.sameValue(x, 11);
+  assert.sameValue(y, 22);
+  assert.sameValue(z, 33);
+  callCount = callCount + 1;
+};
+
+f([{ x: 11, y: 22, z: 33 }]);
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-obj-prop-id-init.js b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-obj-prop-id-init.js
new file mode 100644
index 0000000000..4376ca8cb7
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-obj-prop-id-init.js
@@ -0,0 +1,75 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elem-obj-prop-id-init.case
+// - src/dstr-binding/default/func-expr.template
+/*---
+description: BindingElement with object binding pattern and initializer is used (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    BindingElement : BindingPatternInitializer opt
+
+    [...]
+    2. If iteratorRecord.[[done]] is true, let v be undefined.
+    3. If Initializer is present and v is undefined, then
+       a. Let defaultValue be the result of evaluating Initializer.
+       b. Let v be ? GetValue(defaultValue).
+    4. Return the result of performing BindingInitialization of BindingPattern
+       with v and environment as the arguments.
+---*/
+
+var callCount = 0;
+var f;
+f = function([{ u: v, w: x, y: z } = { u: 444, w: 555, y: 666 }]) {
+  assert.sameValue(v, 444);
+  assert.sameValue(x, 555);
+  assert.sameValue(z, 666);
+
+  assert.throws(ReferenceError, function() {
+    u;
+  });
+  assert.throws(ReferenceError, function() {
+    w;
+  });
+  assert.throws(ReferenceError, function() {
+    y;
+  });
+  callCount = callCount + 1;
+};
+
+f([]);
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-obj-prop-id.js b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-obj-prop-id.js
new file mode 100644
index 0000000000..ba873ba4e9
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-obj-prop-id.js
@@ -0,0 +1,75 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elem-obj-prop-id.case
+// - src/dstr-binding/default/func-expr.template
+/*---
+description: BindingElement with object binding pattern and initializer is not used (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    BindingElement : BindingPatternInitializer opt
+
+    [...]
+    2. If iteratorRecord.[[done]] is true, let v be undefined.
+    3. If Initializer is present and v is undefined, then
+       a. Let defaultValue be the result of evaluating Initializer.
+       b. Let v be ? GetValue(defaultValue).
+    4. Return the result of performing BindingInitialization of BindingPattern
+       with v and environment as the arguments.
+---*/
+
+var callCount = 0;
+var f;
+f = function([{ u: v, w: x, y: z } = { u: 444, w: 555, y: 666 }]) {
+  assert.sameValue(v, 777);
+  assert.sameValue(x, 888);
+  assert.sameValue(z, 999);
+
+  assert.throws(ReferenceError, function() {
+    u;
+  });
+  assert.throws(ReferenceError, function() {
+    w;
+  });
+  assert.throws(ReferenceError, function() {
+    y;
+  });
+  callCount = callCount + 1;
+};
+
+f([{ u: 777, w: 888, y: 999 }]);
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-obj-val-null.js b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-obj-val-null.js
new file mode 100644
index 0000000000..e6e7ef21ff
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-obj-val-null.js
@@ -0,0 +1,66 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elem-obj-val-null.case
+// - src/dstr-binding/error/func-expr.template
+/*---
+description: Nested object destructuring with a null value (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    BindingElement : BindingPattern Initializeropt
+
+    1. If iteratorRecord.[[done]] is false, then
+       [...]
+       e. Else
+          i. Let v be IteratorValue(next).
+          [...]
+    4. Return the result of performing BindingInitialization of BindingPattern
+       with v and environment as the arguments.
+
+    13.3.3.5 Runtime Semantics: BindingInitialization
+
+    BindingPattern : ObjectBindingPattern
+
+    1. Let valid be RequireObjectCoercible(value).
+    2. ReturnIfAbrupt(valid).
+---*/
+
+var f = function([{ x }]) {};
+
+assert.throws(TypeError, function() {
+  f([null]);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-obj-val-undef.js b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-obj-val-undef.js
new file mode 100644
index 0000000000..a511091446
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elem-obj-val-undef.js
@@ -0,0 +1,66 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elem-obj-val-undef.case
+// - src/dstr-binding/error/func-expr.template
+/*---
+description: Nested object destructuring with a value of `undefined` (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    BindingElement : BindingPattern Initializeropt
+
+    1. If iteratorRecord.[[done]] is false, then
+       [...]
+       e. Else
+          i. Let v be IteratorValue(next).
+          [...]
+    4. Return the result of performing BindingInitialization of BindingPattern
+       with v and environment as the arguments.
+
+    13.3.3.5 Runtime Semantics: BindingInitialization
+
+    BindingPattern : ObjectBindingPattern
+
+    1. Let valid be RequireObjectCoercible(value).
+    2. ReturnIfAbrupt(valid).
+---*/
+
+var f = function([{ x }]) {};
+
+assert.throws(TypeError, function() {
+  f([]);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elision-exhausted.js b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elision-exhausted.js
new file mode 100644
index 0000000000..f601a84a67
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elision-exhausted.js
@@ -0,0 +1,70 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elision-exhausted.case
+// - src/dstr-binding/default/func-expr.template
+/*---
+description: Elision accepts exhausted iterator (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [generators, destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    ArrayBindingPattern : [ Elision ]
+
+    1. Return the result of performing
+       IteratorDestructuringAssignmentEvaluation of Elision with iteratorRecord
+       as the argument.
+
+    12.14.5.3 Runtime Semantics: IteratorDestructuringAssignmentEvaluation
+
+    Elision : ,
+
+    1. If iteratorRecord.[[done]] is false, then
+       [...]
+    2. Return NormalCompletion(empty).
+
+---*/
+var iter = function*() {}();
+iter.next();
+
+var callCount = 0;
+var f;
+f = function([,]) {
+  
+  callCount = callCount + 1;
+};
+
+f(iter);
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elision-step-err.js b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elision-step-err.js
new file mode 100644
index 0000000000..7f1fc5107c
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elision-step-err.js
@@ -0,0 +1,73 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elision-step-err.case
+// - src/dstr-binding/error/func-expr.template
+/*---
+description: Elision advances iterator and forwards abrupt completions (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [generators, destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    ArrayBindingPattern : [ Elision ]
+
+    1. Return the result of performing
+       IteratorDestructuringAssignmentEvaluation of Elision with iteratorRecord
+       as the argument.
+
+    12.14.5.3 Runtime Semantics: IteratorDestructuringAssignmentEvaluation
+
+    Elision : ,
+
+    1. If iteratorRecord.[[done]] is false, then
+       a. Let next be IteratorStep(iteratorRecord.[[iterator]]).
+       b. If next is an abrupt completion, set iteratorRecord.[[done]] to true.
+       c. ReturnIfAbrupt(next).
+
+---*/
+var following = 0;
+var iter =function* () {
+  throw new Test262Error();
+  following += 1;
+}();
+
+var f = function([,]) {};
+
+assert.throws(Test262Error, function() {
+  f(iter);
+});
+
+iter.next();
+assert.sameValue(following, 0, 'Iterator was properly closed.');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elision.js b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elision.js
new file mode 100644
index 0000000000..f214aac224
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-elision.js
@@ -0,0 +1,79 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elision.case
+// - src/dstr-binding/default/func-expr.template
+/*---
+description: Elision advances iterator (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [generators, destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    ArrayBindingPattern : [ Elision ]
+
+    1. Return the result of performing
+       IteratorDestructuringAssignmentEvaluation of Elision with iteratorRecord
+       as the argument.
+
+    12.14.5.3 Runtime Semantics: IteratorDestructuringAssignmentEvaluation
+
+    Elision : ,
+
+    1. If iteratorRecord.[[done]] is false, then
+       a. Let next be IteratorStep(iteratorRecord.[[iterator]]).
+       b. If next is an abrupt completion, set iteratorRecord.[[done]] to true.
+       c. ReturnIfAbrupt(next).
+       d. If next is false, set iteratorRecord.[[done]] to true.
+    2. Return NormalCompletion(empty).
+
+---*/
+var first = 0;
+var second = 0;
+function* g() {
+  first += 1;
+  yield;
+  second += 1;
+};
+
+var callCount = 0;
+var f;
+f = function([,]) {
+  assert.sameValue(first, 1);
+  assert.sameValue(second, 0);
+  callCount = callCount + 1;
+};
+
+f(g());
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-empty.js b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-empty.js
new file mode 100644
index 0000000000..c924d6b660
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-empty.js
@@ -0,0 +1,62 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-empty.case
+// - src/dstr-binding/default/func-expr.template
+/*---
+description: No iteration occurs for an "empty" array binding pattern (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [generators, destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    ArrayBindingPattern : [ ]
+
+    1. Return NormalCompletion(empty).
+
+---*/
+var iterations = 0;
+var iter = function*() {
+  iterations += 1;
+}();
+
+var callCount = 0;
+var f;
+f = function([]) {
+  assert.sameValue(iterations, 0);
+  callCount = callCount + 1;
+};
+
+f(iter);
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-rest-ary-elem.js b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-rest-ary-elem.js
new file mode 100644
index 0000000000..75abfebf36
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-rest-ary-elem.js
@@ -0,0 +1,86 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-rest-ary-elem.case
+// - src/dstr-binding/default/func-expr.template
+/*---
+description: Rest element containing an array BindingElementList pattern (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    BindingRestElement : ... BindingPattern
+
+    1. Let A be ArrayCreate(0).
+    [...]
+    3. Repeat
+       [...]
+       b. If iteratorRecord.[[done]] is true, then
+          i. Return the result of performing BindingInitialization of
+             BindingPattern with A and environment as the arguments.
+       [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    SingleNameBinding : BindingIdentifier Initializeropt
+
+    [...]
+    4. If iteratorRecord.[[done]] is false, then
+       a. Let next be IteratorStep(iteratorRecord.[[iterator]]).
+       b. If next is an abrupt completion, set iteratorRecord.[[done]] to true.
+       c. ReturnIfAbrupt(next).
+       d. If next is false, set iteratorRecord.[[done]] to true.
+       e. Else,
+          [...]
+          i. Let v be IteratorValue(next).
+          ii. If v is an abrupt completion, set
+              iteratorRecord.[[done]] to true.
+          iii. ReturnIfAbrupt(v).
+    5. If iteratorRecord.[[done]] is true, let v be undefined.
+    [...]
+    8. Return InitializeReferencedBinding(lhs, v).
+---*/
+
+var callCount = 0;
+var f;
+f = function([...[x, y, z]]) {
+  assert.sameValue(x, 3);
+  assert.sameValue(y, 4);
+  assert.sameValue(z, 5);
+  callCount = callCount + 1;
+};
+
+f([3, 4, 5]);
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-rest-ary-elision.js b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-rest-ary-elision.js
new file mode 100644
index 0000000000..9cfcb0e536
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-rest-ary-elision.js
@@ -0,0 +1,92 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-rest-ary-elision.case
+// - src/dstr-binding/default/func-expr.template
+/*---
+description: Rest element containing an elision (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [generators, destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    BindingRestElement : ... BindingPattern
+
+    1. Let A be ArrayCreate(0).
+    [...]
+    3. Repeat
+       [...]
+       b. If iteratorRecord.[[done]] is true, then
+          i. Return the result of performing BindingInitialization of
+             BindingPattern with A and environment as the arguments.
+       [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    ArrayBindingPattern : [ Elision ]
+
+    1. Return the result of performing
+       IteratorDestructuringAssignmentEvaluation of Elision with iteratorRecord
+       as the argument.
+
+    12.14.5.3 Runtime Semantics: IteratorDestructuringAssignmentEvaluation
+
+    Elision : ,
+
+    1. If iteratorRecord.[[done]] is false, then
+       a. Let next be IteratorStep(iteratorRecord.[[iterator]]).
+       b. If next is an abrupt completion, set iteratorRecord.[[done]] to true.
+       c. ReturnIfAbrupt(next).
+       d. If next is false, set iteratorRecord.[[done]] to true.
+    2. Return NormalCompletion(empty).
+
+---*/
+var first = 0;
+var second = 0;
+function* g() {
+  first += 1;
+  yield;
+  second += 1;
+};
+
+var callCount = 0;
+var f;
+f = function([...[,]]) {
+  assert.sameValue(first, 1);
+  assert.sameValue(second, 1);
+  callCount = callCount + 1;
+};
+
+f(g());
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-rest-ary-empty.js b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-rest-ary-empty.js
new file mode 100644
index 0000000000..0a7ca0e09b
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-rest-ary-empty.js
@@ -0,0 +1,75 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-rest-ary-empty.case
+// - src/dstr-binding/default/func-expr.template
+/*---
+description: Rest element containing an "empty" array pattern (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [generators, destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    BindingRestElement : ... BindingPattern
+
+    1. Let A be ArrayCreate(0).
+    [...]
+    3. Repeat
+       [...]
+       b. If iteratorRecord.[[done]] is true, then
+          i. Return the result of performing BindingInitialization of
+             BindingPattern with A and environment as the arguments.
+       [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    ArrayBindingPattern : [ ]
+
+    1. Return NormalCompletion(empty).
+
+---*/
+var iterations = 0;
+var iter = function*() {
+  iterations += 1;
+}();
+
+var callCount = 0;
+var f;
+f = function([...[]]) {
+  assert.sameValue(iterations, 1);
+  callCount = callCount + 1;
+};
+
+f(iter);
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-rest-ary-rest.js b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-rest-ary-rest.js
new file mode 100644
index 0000000000..afc6fedad8
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-rest-ary-rest.js
@@ -0,0 +1,71 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-rest-ary-rest.case
+// - src/dstr-binding/default/func-expr.template
+/*---
+description: Rest element containing a rest element (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    BindingRestElement : ... BindingPattern
+
+    1. Let A be ArrayCreate(0).
+    [...]
+    3. Repeat
+       [...]
+       b. If iteratorRecord.[[done]] is true, then
+          i. Return the result of performing BindingInitialization of
+             BindingPattern with A and environment as the arguments.
+       [...]
+---*/
+var values = [1, 2, 3];
+
+var callCount = 0;
+var f;
+f = function([...[...x]]) {
+  assert(Array.isArray(x));
+  assert.sameValue(x.length, 3);
+  assert.sameValue(x[0], 1);
+  assert.sameValue(x[1], 2);
+  assert.sameValue(x[2], 3);
+  assert.notSameValue(x, values);
+
+  callCount = callCount + 1;
+};
+
+f(values);
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-rest-id-direct.js b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-rest-id-direct.js
new file mode 100644
index 0000000000..a91ae6cebe
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-rest-id-direct.js
@@ -0,0 +1,66 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-rest-id-direct.case
+// - src/dstr-binding/default/func-expr.template
+/*---
+description: Lone rest element (direct binding) (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding]
+flags: [generated]
+includes: [compareArray.js]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    Runtime Semantics: IteratorBindingInitialization
+
+    BindingRestElement : ... BindingIdentifier
+
+    [...]
+    2. Let A be ! ArrayCreate(0).
+    3. Let n be 0.
+    4. Repeat,
+        [...]
+        f. Perform ! CreateDataPropertyOrThrow(A, ! ToString(n), nextValue).
+        g. Set n to n + 1.
+
+---*/
+
+var callCount = 0;
+var f;
+f = function([...x]) {
+  assert(Array.isArray(x));
+  assert.compareArray(x, [1]);
+  callCount = callCount + 1;
+};
+
+f([1]);
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-rest-id-elision-next-err.js b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-rest-id-elision-next-err.js
new file mode 100644
index 0000000000..90c16c0c75
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-rest-id-elision-next-err.js
@@ -0,0 +1,59 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-rest-id-elision-next-err.case
+// - src/dstr-binding/error/func-expr.template
+/*---
+description: Rest element following elision elements (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [generators, destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+    ArrayBindingPattern : [ Elisionopt BindingRestElement ]
+    1. If Elision is present, then
+       a. Let status be the result of performing
+          IteratorDestructuringAssignmentEvaluation of Elision with
+          iteratorRecord as the argument.
+       b. ReturnIfAbrupt(status).
+    2. Return the result of performing IteratorBindingInitialization for
+       BindingRestElement with iteratorRecord and environment as arguments.
+
+---*/
+var iter = (function*() { throw new Test262Error(); })();
+
+var f = function([, ...x]) {};
+
+assert.throws(Test262Error, function() {
+  f(iter);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-rest-id-elision.js b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-rest-id-elision.js
new file mode 100644
index 0000000000..2c737d7500
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-rest-id-elision.js
@@ -0,0 +1,67 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-rest-id-elision.case
+// - src/dstr-binding/default/func-expr.template
+/*---
+description: Rest element following elision elements (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+    ArrayBindingPattern : [ Elisionopt BindingRestElement ]
+    1. If Elision is present, then
+       a. Let status be the result of performing
+          IteratorDestructuringAssignmentEvaluation of Elision with
+          iteratorRecord as the argument.
+       b. ReturnIfAbrupt(status).
+    2. Return the result of performing IteratorBindingInitialization for
+       BindingRestElement with iteratorRecord and environment as arguments.
+---*/
+var values = [1, 2, 3, 4, 5];
+
+var callCount = 0;
+var f;
+f = function([ , , ...x]) {
+  assert(Array.isArray(x));
+  assert.sameValue(x.length, 3);
+  assert.sameValue(x[0], 3);
+  assert.sameValue(x[1], 4);
+  assert.sameValue(x[2], 5);
+  assert.notSameValue(x, values);
+  callCount = callCount + 1;
+};
+
+f(values);
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-rest-id-exhausted.js b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-rest-id-exhausted.js
new file mode 100644
index 0000000000..7bc02a7e6d
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-rest-id-exhausted.js
@@ -0,0 +1,63 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-rest-id-exhausted.case
+// - src/dstr-binding/default/func-expr.template
+/*---
+description: RestElement applied to an exhausted iterator (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [Symbol.iterator, destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+    BindingRestElement : ... BindingIdentifier
+    1. Let lhs be ResolveBinding(StringValue of BindingIdentifier,
+       environment).
+    2. ReturnIfAbrupt(lhs). 3. Let A be ArrayCreate(0). 4. Let n=0. 5. Repeat,
+       [...]
+       b. If iteratorRecord.[[done]] is true, then
+          i. If environment is undefined, return PutValue(lhs, A).
+          ii. Return InitializeReferencedBinding(lhs, A).
+
+---*/
+
+var callCount = 0;
+var f;
+f = function([, , ...x]) {
+  assert(Array.isArray(x));
+  assert.sameValue(x.length, 0);
+  callCount = callCount + 1;
+};
+
+f([1, 2]);
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-rest-id-iter-step-err.js b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-rest-id-iter-step-err.js
new file mode 100644
index 0000000000..6af9a53058
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-rest-id-iter-step-err.js
@@ -0,0 +1,70 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-rest-id-iter-step-err.case
+// - src/dstr-binding/error/func-expr.template
+/*---
+description: Error forwarding when IteratorStep returns an abrupt completion (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [generators, destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+    BindingRestElement : ... BindingIdentifier
+    1. Let lhs be ResolveBinding(StringValue of BindingIdentifier,
+       environment).
+    2. ReturnIfAbrupt(lhs). 3. Let A be ArrayCreate(0). 4. Let n=0. 5. Repeat,
+       a. If iteratorRecord.[[done]] is false,
+          i. Let next be IteratorStep(iteratorRecord.[[iterator]]).
+          ii. If next is an abrupt completion, set iteratorRecord.[[done]] to
+              true.
+          iii. ReturnIfAbrupt(next).
+
+---*/
+var first = 0;
+var second = 0;
+var iter = function*() {
+  first += 1;
+  throw new Test262Error();
+  second += 1;
+}();
+
+var f = function([...x]) {};
+
+assert.throws(Test262Error, function() {
+  f(iter);
+});
+
+iter.next();
+assert.sameValue(first, 1);
+assert.sameValue(second, 0, 'Iterator is closed following abrupt completion.');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-rest-id-iter-val-err.js b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-rest-id-iter-val-err.js
new file mode 100644
index 0000000000..cbd5d774b4
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-rest-id-iter-val-err.js
@@ -0,0 +1,72 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-rest-id-iter-val-err.case
+// - src/dstr-binding/error/func-expr.template
+/*---
+description: Error forwarding when IteratorValue returns an abrupt completion (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [Symbol.iterator, destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+    BindingRestElement : ... BindingIdentifier
+    1. Let lhs be ResolveBinding(StringValue of BindingIdentifier,
+       environment).
+    2. ReturnIfAbrupt(lhs). 3. Let A be ArrayCreate(0). 4. Let n=0. 5. Repeat,
+       [...]
+       c. Let nextValue be IteratorValue(next).
+       d. If nextValue is an abrupt completion, set iteratorRecord.[[done]] to
+          true.
+       e. ReturnIfAbrupt(nextValue).
+
+---*/
+var poisonedValue = Object.defineProperty({}, 'value', {
+  get: function() {
+    throw new Test262Error();
+  }
+});
+var iter = {};
+iter[Symbol.iterator] = function() {
+  return {
+    next: function() {
+      return poisonedValue;
+    }
+  };
+};
+
+var f = function([...x]) {};
+
+assert.throws(Test262Error, function() {
+  f(iter);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-rest-id.js b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-rest-id.js
new file mode 100644
index 0000000000..3d82f6f874
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-rest-id.js
@@ -0,0 +1,64 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-rest-id.case
+// - src/dstr-binding/default/func-expr.template
+/*---
+description: Lone rest element (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+    BindingRestElement : ... BindingIdentifier
+    [...] 3. Let A be ArrayCreate(0). [...] 5. Repeat
+       [...]
+       f. Let status be CreateDataProperty(A, ToString (n), nextValue).
+       [...]
+---*/
+var values = [1, 2, 3];
+
+var callCount = 0;
+var f;
+f = function([...x]) {
+  assert(Array.isArray(x));
+  assert.sameValue(x.length, 3);
+  assert.sameValue(x[0], 1);
+  assert.sameValue(x[1], 2);
+  assert.sameValue(x[2], 3);
+  assert.notSameValue(x, values);
+  callCount = callCount + 1;
+};
+
+f(values);
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-rest-init-ary.js b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-rest-init-ary.js
new file mode 100644
index 0000000000..5bec964c48
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-rest-init-ary.js
@@ -0,0 +1,60 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-rest-init-ary.case
+// - src/dstr-binding/default/func-expr.template
+/*---
+description: Rest element (nested array pattern) does not support initializer (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3 Destructuring Binding Patterns
+    ArrayBindingPattern[Yield] :
+        [ Elisionopt BindingRestElement[?Yield]opt ]
+        [ BindingElementList[?Yield] ]
+        [ BindingElementList[?Yield] , Elisionopt BindingRestElement[?Yield]opt ]
+---*/
+$DONOTEVALUATE();
+
+var callCount = 0;
+var f;
+f = function([...[ x ] = []]) {
+  
+  callCount = callCount + 1;
+};
+
+f([]);
+assert.sameValue(callCount, 1, 'function invoked exactly once');
diff --git a/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-rest-init-id.js b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-rest-init-id.js
new file mode 100644
index 0000000000..9073e2938a
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-rest-init-id.js
@@ -0,0 +1,60 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-rest-init-id.case
+// - src/dstr-binding/default/func-expr.template
+/*---
+description: Rest element (identifier) does not support initializer (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3 Destructuring Binding Patterns
+    ArrayBindingPattern[Yield] :
+        [ Elisionopt BindingRestElement[?Yield]opt ]
+        [ BindingElementList[?Yield] ]
+        [ BindingElementList[?Yield] , Elisionopt BindingRestElement[?Yield]opt ]
+---*/
+$DONOTEVALUATE();
+
+var callCount = 0;
+var f;
+f = function([...x = []]) {
+  
+  callCount = callCount + 1;
+};
+
+f([]);
+assert.sameValue(callCount, 1, 'function invoked exactly once');
diff --git a/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-rest-init-obj.js b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-rest-init-obj.js
new file mode 100644
index 0000000000..011a6bf0b7
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-rest-init-obj.js
@@ -0,0 +1,60 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-rest-init-obj.case
+// - src/dstr-binding/default/func-expr.template
+/*---
+description: Rest element (nested object pattern) does not support initializer (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3 Destructuring Binding Patterns
+    ArrayBindingPattern[Yield] :
+        [ Elisionopt BindingRestElement[?Yield]opt ]
+        [ BindingElementList[?Yield] ]
+        [ BindingElementList[?Yield] , Elisionopt BindingRestElement[?Yield]opt ]
+---*/
+$DONOTEVALUATE();
+
+var callCount = 0;
+var f;
+f = function([...{ x } = []]) {
+  
+  callCount = callCount + 1;
+};
+
+f([]);
+assert.sameValue(callCount, 1, 'function invoked exactly once');
diff --git a/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-rest-not-final-ary.js b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-rest-not-final-ary.js
new file mode 100644
index 0000000000..8f08fcc3f8
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-rest-not-final-ary.js
@@ -0,0 +1,60 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-rest-not-final-ary.case
+// - src/dstr-binding/default/func-expr.template
+/*---
+description: Rest element (array binding pattern) may not be followed by any element (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3 Destructuring Binding Patterns
+    ArrayBindingPattern[Yield] :
+        [ Elisionopt BindingRestElement[?Yield]opt ]
+        [ BindingElementList[?Yield] ]
+        [ BindingElementList[?Yield] , Elisionopt BindingRestElement[?Yield]opt ]
+---*/
+$DONOTEVALUATE();
+
+var callCount = 0;
+var f;
+f = function([...[x], y]) {
+  
+  callCount = callCount + 1;
+};
+
+f([1, 2, 3]);
+assert.sameValue(callCount, 1, 'function invoked exactly once');
diff --git a/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-rest-not-final-id.js b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-rest-not-final-id.js
new file mode 100644
index 0000000000..1c036150d6
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-rest-not-final-id.js
@@ -0,0 +1,60 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-rest-not-final-id.case
+// - src/dstr-binding/default/func-expr.template
+/*---
+description: Rest element (identifier) may not be followed by any element (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3 Destructuring Binding Patterns
+    ArrayBindingPattern[Yield] :
+        [ Elisionopt BindingRestElement[?Yield]opt ]
+        [ BindingElementList[?Yield] ]
+        [ BindingElementList[?Yield] , Elisionopt BindingRestElement[?Yield]opt ]
+---*/
+$DONOTEVALUATE();
+
+var callCount = 0;
+var f;
+f = function([...x, y]) {
+  
+  callCount = callCount + 1;
+};
+
+f([1, 2, 3]);
+assert.sameValue(callCount, 1, 'function invoked exactly once');
diff --git a/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-rest-not-final-obj.js b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-rest-not-final-obj.js
new file mode 100644
index 0000000000..d64f4630fc
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-rest-not-final-obj.js
@@ -0,0 +1,60 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-rest-not-final-obj.case
+// - src/dstr-binding/default/func-expr.template
+/*---
+description: Rest element (object binding pattern) may not be followed by any element (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3 Destructuring Binding Patterns
+    ArrayBindingPattern[Yield] :
+        [ Elisionopt BindingRestElement[?Yield]opt ]
+        [ BindingElementList[?Yield] ]
+        [ BindingElementList[?Yield] , Elisionopt BindingRestElement[?Yield]opt ]
+---*/
+$DONOTEVALUATE();
+
+var callCount = 0;
+var f;
+f = function([...{ x }, y]) {
+  
+  callCount = callCount + 1;
+};
+
+f([1, 2, 3]);
+assert.sameValue(callCount, 1, 'function invoked exactly once');
diff --git a/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-rest-obj-id.js b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-rest-obj-id.js
new file mode 100644
index 0000000000..b571068c3b
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-rest-obj-id.js
@@ -0,0 +1,64 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-rest-obj-id.case
+// - src/dstr-binding/default/func-expr.template
+/*---
+description: Rest element containing an object binding pattern (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    BindingRestElement : ... BindingPattern
+
+    1. Let A be ArrayCreate(0).
+    [...]
+    3. Repeat
+       [...]
+       b. If iteratorRecord.[[done]] is true, then
+          i. Return the result of performing BindingInitialization of
+             BindingPattern with A and environment as the arguments.
+       [...]
+---*/
+
+var callCount = 0;
+var f;
+f = function([...{ length }]) {
+  assert.sameValue(length, 3);
+  callCount = callCount + 1;
+};
+
+f([1, 2, 3]);
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-rest-obj-prop-id.js b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-rest-obj-prop-id.js
new file mode 100644
index 0000000000..1d659a2a31
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/ary-ptrn-rest-obj-prop-id.js
@@ -0,0 +1,71 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-rest-obj-prop-id.case
+// - src/dstr-binding/default/func-expr.template
+/*---
+description: Rest element containing an object binding pattern (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    BindingRestElement : ... BindingPattern
+
+    1. Let A be ArrayCreate(0).
+    [...]
+    3. Repeat
+       [...]
+       b. If iteratorRecord.[[done]] is true, then
+          i. Return the result of performing BindingInitialization of
+             BindingPattern with A and environment as the arguments.
+       [...]
+---*/
+let length = "outer";
+
+var callCount = 0;
+var f;
+f = function([...{ 0: v, 1: w, 2: x, 3: y, length: z }]) {
+  assert.sameValue(v, 7);
+  assert.sameValue(w, 8);
+  assert.sameValue(x, 9);
+  assert.sameValue(y, undefined);
+  assert.sameValue(z, 3);
+
+  assert.sameValue(length, "outer", "the length prop is not set as a binding name");
+  callCount = callCount + 1;
+};
+
+f([7, 8, 9]);
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/browser.js b/js/src/tests/test262/language/expressions/function/dstr/browser.js
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/browser.js
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-init-iter-close.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-init-iter-close.js
new file mode 100644
index 0000000000..5a7cd2f3bd
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-init-iter-close.js
@@ -0,0 +1,74 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-init-iter-close.case
+// - src/dstr-binding/default/func-expr-dflt.template
+/*---
+description: Iterator is closed when not exhausted by pattern evaluation (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [Symbol.iterator, destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.5 Runtime Semantics: BindingInitialization
+
+    BindingPattern : ArrayBindingPattern
+
+    [...]
+    4. If iteratorRecord.[[done]] is false, return ? IteratorClose(iterator,
+       result).
+    [...]
+
+---*/
+var doneCallCount = 0;
+var iter = {};
+iter[Symbol.iterator] = function() {
+  return {
+    next: function() {
+      return { value: null, done: false };
+    },
+    return: function() {
+      doneCallCount += 1;
+      return {};
+    }
+  };
+};
+
+var callCount = 0;
+var f;
+f = function([x] = iter) {
+  assert.sameValue(doneCallCount, 1);
+  callCount = callCount + 1;
+};
+
+f();
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-init-iter-get-err-array-prototype.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-init-iter-get-err-array-prototype.js
new file mode 100644
index 0000000000..0677758d61
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-init-iter-get-err-array-prototype.js
@@ -0,0 +1,65 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-init-iter-get-err-array-prototype.case
+// - src/dstr-binding/error/func-expr-dflt.template
+/*---
+description: Abrupt completion returned by GetIterator (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [Symbol.iterator, destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    Runtime Semantics: BindingInitialization
+
+    BindingPattern : ArrayBindingPattern
+
+    1. Let iteratorRecord be ? GetIterator(value).
+
+    GetIterator ( obj [ , hint [ , method ] ] )
+
+    [...]
+    4. Let iterator be ? Call(method, obj).
+
+    Call ( F, V [ , argumentsList ] )
+
+    [...]
+    2. If IsCallable(F) is false, throw a TypeError exception.
+
+---*/
+delete Array.prototype[Symbol.iterator];
+
+var f = function([x, y, z] = [1, 2, 3]) {};
+
+assert.throws(TypeError, function() {
+  f();
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-init-iter-get-err.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-init-iter-get-err.js
new file mode 100644
index 0000000000..2434f8b0f5
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-init-iter-get-err.js
@@ -0,0 +1,59 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-init-iter-get-err.case
+// - src/dstr-binding/error/func-expr-dflt.template
+/*---
+description: Abrupt completion returned by GetIterator (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [Symbol.iterator, destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.5 Runtime Semantics: BindingInitialization
+
+    BindingPattern : ArrayBindingPattern
+
+    1. Let iterator be GetIterator(value).
+    2. ReturnIfAbrupt(iterator).
+
+---*/
+var iter = {};
+iter[Symbol.iterator] = function() {
+  throw new Test262Error();
+};
+
+var f = function([x] = iter) {};
+
+assert.throws(Test262Error, function() {
+  f();
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-init-iter-no-close.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-init-iter-no-close.js
new file mode 100644
index 0000000000..1dbe14c4bf
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-init-iter-no-close.js
@@ -0,0 +1,74 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-init-iter-no-close.case
+// - src/dstr-binding/default/func-expr-dflt.template
+/*---
+description: Iterator is not closed when exhausted by pattern evaluation (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [Symbol.iterator, destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.5 Runtime Semantics: BindingInitialization
+
+    BindingPattern : ArrayBindingPattern
+
+    [...]
+    4. If iteratorRecord.[[done]] is false, return ? IteratorClose(iterator,
+       result).
+    [...]
+
+---*/
+var doneCallCount = 0;
+var iter = {};
+iter[Symbol.iterator] = function() {
+  return {
+    next: function() {
+      return { value: null, done: true };
+    },
+    return: function() {
+      doneCallCount += 1;
+      return {};
+    }
+  };
+};
+
+var callCount = 0;
+var f;
+f = function([x] = iter) {
+  assert.sameValue(doneCallCount, 0);
+  callCount = callCount + 1;
+};
+
+f();
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-name-iter-val.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-name-iter-val.js
new file mode 100644
index 0000000000..7d286a97b8
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-name-iter-val.js
@@ -0,0 +1,73 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-name-iter-val.case
+// - src/dstr-binding/default/func-expr-dflt.template
+/*---
+description: SingleNameBinding with normal value iteration (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    SingleNameBinding : BindingIdentifier Initializeropt
+
+    [...]
+    4. If iteratorRecord.[[done]] is false, then
+       a. Let next be IteratorStep(iteratorRecord.[[iterator]]).
+       b. If next is an abrupt completion, set iteratorRecord.[[done]] to true.
+       c. ReturnIfAbrupt(next).
+       d. If next is false, set iteratorRecord.[[done]] to true.
+       e. Else,
+          [...]
+          i. Let v be IteratorValue(next).
+          ii. If v is an abrupt completion, set
+              iteratorRecord.[[done]] to true.
+          iii. ReturnIfAbrupt(v).
+    5. If iteratorRecord.[[done]] is true, let v be undefined.
+    [...]
+    8. Return InitializeReferencedBinding(lhs, v).
+---*/
+
+var callCount = 0;
+var f;
+f = function([x, y, z] = [1, 2, 3]) {
+  assert.sameValue(x, 1);
+  assert.sameValue(y, 2);
+  assert.sameValue(z, 3);
+  callCount = callCount + 1;
+};
+
+f();
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-ary-elem-init.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-ary-elem-init.js
new file mode 100644
index 0000000000..bb53c433ea
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-ary-elem-init.js
@@ -0,0 +1,65 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elem-ary-elem-init.case
+// - src/dstr-binding/default/func-expr-dflt.template
+/*---
+description: BindingElement with array binding pattern and initializer is used (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    BindingElement : BindingPatternInitializer opt
+
+    [...]
+    2. If iteratorRecord.[[done]] is true, let v be undefined.
+    3. If Initializer is present and v is undefined, then
+       a. Let defaultValue be the result of evaluating Initializer.
+       b. Let v be ? GetValue(defaultValue).
+    4. Return the result of performing BindingInitialization of BindingPattern
+       with v and environment as the arguments.
+---*/
+
+var callCount = 0;
+var f;
+f = function([[x, y, z] = [4, 5, 6]] = []) {
+  assert.sameValue(x, 4);
+  assert.sameValue(y, 5);
+  assert.sameValue(z, 6);
+  callCount = callCount + 1;
+};
+
+f();
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-ary-elem-iter.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-ary-elem-iter.js
new file mode 100644
index 0000000000..0a7410d00c
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-ary-elem-iter.js
@@ -0,0 +1,66 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elem-ary-elem-iter.case
+// - src/dstr-binding/default/func-expr-dflt.template
+/*---
+description: BindingElement with array binding pattern and initializer is not used (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    BindingElement : BindingPatternInitializer opt
+
+    1. If iteratorRecord.[[done]] is false, then
+       a. Let next be IteratorStep(iteratorRecord.[[iterator]]).
+       [...]
+       e. Else,
+          i. Let v be IteratorValue(next).
+          [...]
+    4. Return the result of performing BindingInitialization of BindingPattern
+       with v and environment as the arguments.
+---*/
+
+var callCount = 0;
+var f;
+f = function([[x, y, z] = [4, 5, 6]] = [[7, 8, 9]]) {
+  assert.sameValue(x, 7);
+  assert.sameValue(y, 8);
+  assert.sameValue(z, 9);
+  callCount = callCount + 1;
+};
+
+f();
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-ary-elision-init.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-ary-elision-init.js
new file mode 100644
index 0000000000..60a88a0839
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-ary-elision-init.js
@@ -0,0 +1,72 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elem-ary-elision-init.case
+// - src/dstr-binding/default/func-expr-dflt.template
+/*---
+description: BindingElement with array binding pattern and initializer is used (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [generators, destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    BindingElement : BindingPatternInitializer opt
+
+    [...]
+    2. If iteratorRecord.[[done]] is true, let v be undefined.
+    3. If Initializer is present and v is undefined, then
+       a. Let defaultValue be the result of evaluating Initializer.
+       b. Let v be ? GetValue(defaultValue).
+    4. Return the result of performing BindingInitialization of BindingPattern
+       with v and environment as the arguments.
+
+---*/
+var first = 0;
+var second = 0;
+function* g() {
+  first += 1;
+  yield;
+  second += 1;
+};
+
+var callCount = 0;
+var f;
+f = function([[,] = g()] = []) {
+  assert.sameValue(first, 1);
+  assert.sameValue(second, 0);
+  callCount = callCount + 1;
+};
+
+f();
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-ary-elision-iter.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-ary-elision-iter.js
new file mode 100644
index 0000000000..e9e472a0ae
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-ary-elision-iter.js
@@ -0,0 +1,69 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elem-ary-elision-iter.case
+// - src/dstr-binding/default/func-expr-dflt.template
+/*---
+description: BindingElement with array binding pattern and initializer is not used (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [generators, destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    BindingElement : BindingPatternInitializer opt
+
+    1. If iteratorRecord.[[done]] is false, then
+       a. Let next be IteratorStep(iteratorRecord.[[iterator]]).
+       [...]
+       e. Else,
+          i. Let v be IteratorValue(next).
+          [...]
+    4. Return the result of performing BindingInitialization of BindingPattern
+       with v and environment as the arguments.
+
+---*/
+var callCount = 0;
+function* g() {
+  callCount += 1;
+};
+
+var callCount = 0;
+var f;
+f = function([[,] = g()] = [[]]) {
+  assert.sameValue(callCount, 0);
+  callCount = callCount + 1;
+};
+
+f();
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-ary-empty-init.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-ary-empty-init.js
new file mode 100644
index 0000000000..bd8f7aad3e
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-ary-empty-init.js
@@ -0,0 +1,68 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elem-ary-empty-init.case
+// - src/dstr-binding/default/func-expr-dflt.template
+/*---
+description: BindingElement with array binding pattern and initializer is used (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [generators, destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    BindingElement : BindingPatternInitializer opt
+
+    [...]
+    2. If iteratorRecord.[[done]] is true, let v be undefined.
+    3. If Initializer is present and v is undefined, then
+       a. Let defaultValue be the result of evaluating Initializer.
+       b. Let v be ? GetValue(defaultValue).
+    4. Return the result of performing BindingInitialization of BindingPattern
+       with v and environment as the arguments.
+
+---*/
+var initCount = 0;
+var iterCount = 0;
+var iter = function*() { iterCount += 1; }();
+
+var callCount = 0;
+var f;
+f = function([[] = function() { initCount += 1; return iter; }()] = []) {
+  assert.sameValue(initCount, 1);
+  assert.sameValue(iterCount, 0);
+  callCount = callCount + 1;
+};
+
+f();
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-ary-empty-iter.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-ary-empty-iter.js
new file mode 100644
index 0000000000..63b693e69a
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-ary-empty-iter.js
@@ -0,0 +1,65 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elem-ary-empty-iter.case
+// - src/dstr-binding/default/func-expr-dflt.template
+/*---
+description: BindingElement with array binding pattern and initializer is not used (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    BindingElement : BindingPatternInitializer opt
+
+    1. If iteratorRecord.[[done]] is false, then
+       a. Let next be IteratorStep(iteratorRecord.[[iterator]]).
+       [...]
+       e. Else,
+          i. Let v be IteratorValue(next).
+          [...]
+    4. Return the result of performing BindingInitialization of BindingPattern
+       with v and environment as the arguments.
+---*/
+var initCount = 0;
+
+var callCount = 0;
+var f;
+f = function([[] = function() { initCount += 1; }()] = [[23]]) {
+  assert.sameValue(initCount, 0);
+  callCount = callCount + 1;
+};
+
+f();
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-ary-rest-init.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-ary-rest-init.js
new file mode 100644
index 0000000000..f053301274
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-ary-rest-init.js
@@ -0,0 +1,69 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elem-ary-rest-init.case
+// - src/dstr-binding/default/func-expr-dflt.template
+/*---
+description: BindingElement with array binding pattern and initializer is used (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    BindingElement : BindingPatternInitializer opt
+
+    [...]
+    2. If iteratorRecord.[[done]] is true, let v be undefined.
+    3. If Initializer is present and v is undefined, then
+       a. Let defaultValue be the result of evaluating Initializer.
+       b. Let v be ? GetValue(defaultValue).
+    4. Return the result of performing BindingInitialization of BindingPattern
+       with v and environment as the arguments.
+---*/
+var values = [2, 1, 3];
+
+var callCount = 0;
+var f;
+f = function([[...x] = values] = []) {
+  assert(Array.isArray(x));
+  assert.sameValue(x[0], 2);
+  assert.sameValue(x[1], 1);
+  assert.sameValue(x[2], 3);
+  assert.sameValue(x.length, 3);
+  assert.notSameValue(x, values);
+  callCount = callCount + 1;
+};
+
+f();
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-ary-rest-iter.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-ary-rest-iter.js
new file mode 100644
index 0000000000..36e814c2e8
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-ary-rest-iter.js
@@ -0,0 +1,72 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elem-ary-rest-iter.case
+// - src/dstr-binding/default/func-expr-dflt.template
+/*---
+description: BindingElement with array binding pattern and initializer is not used (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    BindingElement : BindingPatternInitializer opt
+
+    1. If iteratorRecord.[[done]] is false, then
+       a. Let next be IteratorStep(iteratorRecord.[[iterator]]).
+       [...]
+       e. Else,
+          i. Let v be IteratorValue(next).
+          [...]
+    4. Return the result of performing BindingInitialization of BindingPattern
+       with v and environment as the arguments.
+---*/
+var values = [2, 1, 3];
+var initCount = 0;
+
+var callCount = 0;
+var f;
+f = function([[...x] = function() { initCount += 1; }()] = [values]) {
+  assert(Array.isArray(x));
+  assert.sameValue(x[0], 2);
+  assert.sameValue(x[1], 1);
+  assert.sameValue(x[2], 3);
+  assert.sameValue(x.length, 3);
+  assert.notSameValue(x, values);
+  assert.sameValue(initCount, 0);
+  callCount = callCount + 1;
+};
+
+f();
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-ary-val-null.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-ary-val-null.js
new file mode 100644
index 0000000000..ea52caf041
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-ary-val-null.js
@@ -0,0 +1,66 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elem-ary-val-null.case
+// - src/dstr-binding/error/func-expr-dflt.template
+/*---
+description: Nested array destructuring with a null value (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    BindingElement : BindingPattern Initializeropt
+
+    1. If iteratorRecord.[[done]] is false, then
+       [...]
+       e. Else
+          i. Let v be IteratorValue(next).
+          [...]
+    4. Return the result of performing BindingInitialization of BindingPattern
+       with v and environment as the arguments.
+
+    13.3.3.5 Runtime Semantics: BindingInitialization
+
+    BindingPattern : ArrayBindingPattern
+
+    1. Let iterator be GetIterator(value).
+    2. ReturnIfAbrupt(iterator).
+---*/
+
+var f = function([[x]] = [null]) {};
+
+assert.throws(TypeError, function() {
+  f();
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-id-init-exhausted.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-id-init-exhausted.js
new file mode 100644
index 0000000000..9ab1e72d91
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-id-init-exhausted.js
@@ -0,0 +1,64 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elem-id-init-exhausted.case
+// - src/dstr-binding/default/func-expr-dflt.template
+/*---
+description: Destructuring initializer with an exhausted iterator (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    SingleNameBinding : BindingIdentifier Initializeropt
+
+    [...]
+    5. If iteratorRecord.[[done]] is true, let v be undefined.
+    6. If Initializer is present and v is undefined, then
+       a. Let defaultValue be the result of evaluating Initializer.
+       b. Let v be GetValue(defaultValue).
+       [...]
+    7. If environment is undefined, return PutValue(lhs, v).
+    8. Return InitializeReferencedBinding(lhs, v).
+---*/
+
+var callCount = 0;
+var f;
+f = function([x = 23] = []) {
+  assert.sameValue(x, 23);
+  callCount = callCount + 1;
+};
+
+f();
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-id-init-fn-name-arrow.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-id-init-fn-name-arrow.js
new file mode 100644
index 0000000000..606879c24d
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-id-init-fn-name-arrow.js
@@ -0,0 +1,65 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elem-id-init-fn-name-arrow.case
+// - src/dstr-binding/default/func-expr-dflt.template
+/*---
+description: SingleNameBinding does assign name to arrow functions (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    SingleNameBinding : BindingIdentifier Initializeropt
+
+    [...]
+    6. If Initializer is present and v is undefined, then
+       a. Let defaultValue be the result of evaluating Initializer.
+       b. Let v be GetValue(defaultValue).
+       c. ReturnIfAbrupt(v).
+       d. If IsAnonymousFunctionDefinition(Initializer) is true, then
+          [...]
+    7. If environment is undefined, return PutValue(lhs, v).
+    8. Return InitializeReferencedBinding(lhs, v).
+---*/
+
+var callCount = 0;
+var f;
+f = function([arrow = () => {}] = []) {
+  assert.sameValue(arrow.name, 'arrow');
+  callCount = callCount + 1;
+};
+
+f();
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-id-init-fn-name-class.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-id-init-fn-name-class.js
new file mode 100644
index 0000000000..e455100f33
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-id-init-fn-name-class.js
@@ -0,0 +1,67 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elem-id-init-fn-name-class.case
+// - src/dstr-binding/default/func-expr-dflt.template
+/*---
+description: SingleNameBinding assigns `name` to "anonymous" classes (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    SingleNameBinding : BindingIdentifier Initializeropt
+
+    [...]
+    6. If Initializer is present and v is undefined, then
+       a. Let defaultValue be the result of evaluating Initializer.
+       b. Let v be GetValue(defaultValue).
+       c. ReturnIfAbrupt(v).
+       d. If IsAnonymousFunctionDefinition(Initializer) is true, then
+          [...]
+    7. If environment is undefined, return PutValue(lhs, v).
+    8. Return InitializeReferencedBinding(lhs, v).
+---*/
+
+var callCount = 0;
+var f;
+f = function([cls = class {}, xCls = class X {}, xCls2 = class { static name() {} }] = []) {
+  assert.sameValue(cls.name, 'cls');
+  assert.notSameValue(xCls.name, 'xCls');
+  assert.notSameValue(xCls2.name, 'xCls2');
+  callCount = callCount + 1;
+};
+
+f();
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-id-init-fn-name-cover.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-id-init-fn-name-cover.js
new file mode 100644
index 0000000000..303a7ff91b
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-id-init-fn-name-cover.js
@@ -0,0 +1,66 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elem-id-init-fn-name-cover.case
+// - src/dstr-binding/default/func-expr-dflt.template
+/*---
+description: SingleNameBinding does assign name to "anonymous" functions "through" cover grammar (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    SingleNameBinding : BindingIdentifier Initializeropt
+
+    [...]
+    6. If Initializer is present and v is undefined, then
+       a. Let defaultValue be the result of evaluating Initializer.
+       b. Let v be GetValue(defaultValue).
+       c. ReturnIfAbrupt(v).
+       d. If IsAnonymousFunctionDefinition(Initializer) is true, then
+          [...]
+    7. If environment is undefined, return PutValue(lhs, v).
+    8. Return InitializeReferencedBinding(lhs, v).
+---*/
+
+var callCount = 0;
+var f;
+f = function([cover = (function () {}), xCover = (0, function() {})] = []) {
+  assert.sameValue(cover.name, 'cover');
+  assert.notSameValue(xCover.name, 'xCover');
+  callCount = callCount + 1;
+};
+
+f();
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-id-init-fn-name-fn.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-id-init-fn-name-fn.js
new file mode 100644
index 0000000000..b26b8018be
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-id-init-fn-name-fn.js
@@ -0,0 +1,66 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elem-id-init-fn-name-fn.case
+// - src/dstr-binding/default/func-expr-dflt.template
+/*---
+description: SingleNameBinding assigns name to "anonymous" functions (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    SingleNameBinding : BindingIdentifier Initializeropt
+
+    [...]
+    6. If Initializer is present and v is undefined, then
+       a. Let defaultValue be the result of evaluating Initializer.
+       b. Let v be GetValue(defaultValue).
+       c. ReturnIfAbrupt(v).
+       d. If IsAnonymousFunctionDefinition(Initializer) is true, then
+          [...]
+    7. If environment is undefined, return PutValue(lhs, v).
+    8. Return InitializeReferencedBinding(lhs, v).
+---*/
+
+var callCount = 0;
+var f;
+f = function([fn = function () {}, xFn = function x() {}] = []) {
+  assert.sameValue(fn.name, 'fn');
+  assert.notSameValue(xFn.name, 'xFn');
+  callCount = callCount + 1;
+};
+
+f();
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-id-init-fn-name-gen.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-id-init-fn-name-gen.js
new file mode 100644
index 0000000000..1292b732c4
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-id-init-fn-name-gen.js
@@ -0,0 +1,67 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elem-id-init-fn-name-gen.case
+// - src/dstr-binding/default/func-expr-dflt.template
+/*---
+description: SingleNameBinding assigns name to "anonymous" generator functions (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [generators, destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    SingleNameBinding : BindingIdentifier Initializeropt
+
+    [...]
+    6. If Initializer is present and v is undefined, then
+       a. Let defaultValue be the result of evaluating Initializer.
+       b. Let v be GetValue(defaultValue).
+       c. ReturnIfAbrupt(v).
+       d. If IsAnonymousFunctionDefinition(Initializer) is true, then
+          [...]
+    7. If environment is undefined, return PutValue(lhs, v).
+    8. Return InitializeReferencedBinding(lhs, v).
+
+---*/
+
+var callCount = 0;
+var f;
+f = function([gen = function* () {}, xGen = function* x() {}] = []) {
+  assert.sameValue(gen.name, 'gen');
+  assert.notSameValue(xGen.name, 'xGen');
+  callCount = callCount + 1;
+};
+
+f();
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-id-init-hole.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-id-init-hole.js
new file mode 100644
index 0000000000..615c76fe1c
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-id-init-hole.js
@@ -0,0 +1,60 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elem-id-init-hole.case
+// - src/dstr-binding/default/func-expr-dflt.template
+/*---
+description: Destructuring initializer with a "hole" (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+    SingleNameBinding : BindingIdentifier Initializeropt
+    [...] 6. If Initializer is present and v is undefined, then
+       a. Let defaultValue be the result of evaluating Initializer.
+       b. Let v be GetValue(defaultValue).
+       [...]
+    7. If environment is undefined, return PutValue(lhs, v). 8. Return InitializeReferencedBinding(lhs, v).
+---*/
+
+var callCount = 0;
+var f;
+f = function([x = 23] = [,]) {
+  assert.sameValue(x, 23);
+  // another statement
+  callCount = callCount + 1;
+};
+
+f();
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-id-init-skipped.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-id-init-skipped.js
new file mode 100644
index 0000000000..7f383fd9c7
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-id-init-skipped.js
@@ -0,0 +1,69 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elem-id-init-skipped.case
+// - src/dstr-binding/default/func-expr-dflt.template
+/*---
+description: Destructuring initializer is not evaluated when value is not `undefined` (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    SingleNameBinding : BindingIdentifier Initializeropt
+
+    [...]
+    6. If Initializer is present and v is undefined, then
+       [...]
+    7. If environment is undefined, return PutValue(lhs, v).
+    8. Return InitializeReferencedBinding(lhs, v).
+---*/
+var initCount = 0;
+function counter() {
+  initCount += 1;
+}
+
+var callCount = 0;
+var f;
+f = function([w = counter(), x = counter(), y = counter(), z = counter()] = [null, 0, false, '']) {
+  assert.sameValue(w, null);
+  assert.sameValue(x, 0);
+  assert.sameValue(y, false);
+  assert.sameValue(z, '');
+  assert.sameValue(initCount, 0);
+  callCount = callCount + 1;
+};
+
+f();
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-id-init-throws.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-id-init-throws.js
new file mode 100644
index 0000000000..ce744fd4da
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-id-init-throws.js
@@ -0,0 +1,57 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elem-id-init-throws.case
+// - src/dstr-binding/error/func-expr-dflt.template
+/*---
+description: Destructuring initializer returns an abrupt completion (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    SingleNameBinding : BindingIdentifier Initializeropt
+
+    [...]
+    6. If Initializer is present and v is undefined, then
+       a. Let defaultValue be the result of evaluating Initializer.
+       b. Let v be GetValue(defaultValue).
+       c. ReturnIfAbrupt(v).
+---*/
+
+var f = function([x = (function() { throw new Test262Error(); })()] = [undefined]) {};
+
+assert.throws(Test262Error, function() {
+  f();
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-id-init-undef.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-id-init-undef.js
new file mode 100644
index 0000000000..06cbd9f0d6
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-id-init-undef.js
@@ -0,0 +1,63 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elem-id-init-undef.case
+// - src/dstr-binding/default/func-expr-dflt.template
+/*---
+description: Destructuring initializer with an undefined value (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    SingleNameBinding : BindingIdentifier Initializeropt
+
+    [...]
+    6. If Initializer is present and v is undefined, then
+       a. Let defaultValue be the result of evaluating Initializer.
+       b. Let v be GetValue(defaultValue).
+       [...]
+    7. If environment is undefined, return PutValue(lhs, v).
+    8. Return InitializeReferencedBinding(lhs, v).
+---*/
+
+var callCount = 0;
+var f;
+f = function([x = 23] = [undefined]) {
+  assert.sameValue(x, 23);
+  callCount = callCount + 1;
+};
+
+f();
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-id-init-unresolvable.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-id-init-unresolvable.js
new file mode 100644
index 0000000000..4dd14270f3
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-id-init-unresolvable.js
@@ -0,0 +1,64 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elem-id-init-unresolvable.case
+// - src/dstr-binding/error/func-expr-dflt.template
+/*---
+description: Destructuring initializer is an unresolvable reference (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    SingleNameBinding : BindingIdentifier Initializeropt
+
+    [...]
+    6. If Initializer is present and v is undefined, then
+       a. Let defaultValue be the result of evaluating Initializer.
+       b. Let v be GetValue(defaultValue).
+       c. ReturnIfAbrupt(v).
+
+    6.2.3.1 GetValue (V)
+
+    1. ReturnIfAbrupt(V).
+    2. If Type(V) is not Reference, return V.
+    3. Let base be GetBase(V).
+    4. If IsUnresolvableReference(V), throw a ReferenceError exception.
+---*/
+
+var f = function([ x = unresolvableReference ] = []) {};
+
+assert.throws(ReferenceError, function() {
+  f();
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-id-iter-complete.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-id-iter-complete.js
new file mode 100644
index 0000000000..f93c353849
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-id-iter-complete.js
@@ -0,0 +1,67 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elem-id-iter-complete.case
+// - src/dstr-binding/default/func-expr-dflt.template
+/*---
+description: SingleNameBinding when value iteration completes (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    SingleNameBinding : BindingIdentifier Initializeropt
+
+    [...]
+    4. If iteratorRecord.[[done]] is false, then
+       a. Let next be IteratorStep(iteratorRecord.[[iterator]]).
+       b. If next is an abrupt completion, set iteratorRecord.[[done]] to true.
+       c. ReturnIfAbrupt(next).
+       d. If next is false, set iteratorRecord.[[done]] to true.
+       e. Else,
+          [...]
+    5. If iteratorRecord.[[done]] is true, let v be undefined.
+    [...]
+    8. Return InitializeReferencedBinding(lhs, v).
+---*/
+
+var callCount = 0;
+var f;
+f = function([x] = []) {
+  assert.sameValue(x, undefined);
+  callCount = callCount + 1;
+};
+
+f();
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-id-iter-done.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-id-iter-done.js
new file mode 100644
index 0000000000..b79a097fb7
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-id-iter-done.js
@@ -0,0 +1,62 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elem-id-iter-done.case
+// - src/dstr-binding/default/func-expr-dflt.template
+/*---
+description: SingleNameBinding when value iteration was completed previously (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    SingleNameBinding : BindingIdentifier Initializeropt
+
+    [...]
+    4. If iteratorRecord.[[done]] is false, then
+       [...]
+    5. If iteratorRecord.[[done]] is true, let v be undefined.
+    [...]
+    8. Return InitializeReferencedBinding(lhs, v).
+---*/
+
+var callCount = 0;
+var f;
+f = function([_, x] = []) {
+  assert.sameValue(x, undefined);
+  callCount = callCount + 1;
+};
+
+f();
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-id-iter-step-err.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-id-iter-step-err.js
new file mode 100644
index 0000000000..77c450f310
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-id-iter-step-err.js
@@ -0,0 +1,66 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elem-id-iter-step-err.case
+// - src/dstr-binding/error/func-expr-dflt.template
+/*---
+description: Error forwarding when IteratorStep returns an abrupt completion (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [Symbol.iterator, destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    SingleNameBinding : BindingIdentifier Initializeropt
+
+    [...]
+    4. If iteratorRecord.[[done]] is false, then
+       a. Let next be IteratorStep(iteratorRecord.[[iterator]]).
+       b. If next is an abrupt completion, set iteratorRecord.[[done]] to true.
+       c. ReturnIfAbrupt(next).
+
+---*/
+var g = {};
+g[Symbol.iterator] = function() {
+  return {
+    next: function() {
+      throw new Test262Error();
+    }
+  };
+};
+
+var f = function([x] = g) {};
+
+assert.throws(Test262Error, function() {
+  f();
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-id-iter-val-array-prototype.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-id-iter-val-array-prototype.js
new file mode 100644
index 0000000000..64234cc410
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-id-iter-val-array-prototype.js
@@ -0,0 +1,83 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elem-id-iter-val-array-prototype.case
+// - src/dstr-binding/default/func-expr-dflt.template
+/*---
+description: Array destructuring uses overriden Array.prototype[Symbol.iterator] (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [Symbol.iterator, generators, destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    Runtime Semantics: IteratorBindingInitialization
+
+    SingleNameBinding : BindingIdentifier Initializer_opt
+
+    1. Let bindingId be StringValue of BindingIdentifier.
+    2. Let lhs be ? ResolveBinding(bindingId, environment).
+    3. If iteratorRecord.[[Done]] is false, then
+        a. Let next be IteratorStep(iteratorRecord).
+        b. If next is an abrupt completion, set iteratorRecord.[[Done]] to true.
+        c. ReturnIfAbrupt(next).
+        d. If next is false, set iteratorRecord.[[Done]] to true.
+        e. Else,
+            i. Let v be IteratorValue(next).
+            ii. If v is an abrupt completion, set iteratorRecord.[[Done]] to true.
+            iii. ReturnIfAbrupt(v).
+    [...]
+    7. Return InitializeReferencedBinding(lhs, v).
+
+---*/
+Array.prototype[Symbol.iterator] = function* () {
+    if (this.length > 0) {
+        yield this[0];
+    }
+    if (this.length > 1) {
+        yield this[1];
+    }
+    if (this.length > 2) {
+        yield 42;
+    }
+};
+
+var callCount = 0;
+var f;
+f = function([x, y, z] = [1, 2, 3]) {
+  assert.sameValue(x, 1);
+  assert.sameValue(y, 2);
+  assert.sameValue(z, 42);
+  callCount = callCount + 1;
+};
+
+f();
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-id-iter-val-err.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-id-iter-val-err.js
new file mode 100644
index 0000000000..3898e00d48
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-id-iter-val-err.js
@@ -0,0 +1,77 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elem-id-iter-val-err.case
+// - src/dstr-binding/error/func-expr-dflt.template
+/*---
+description: Error forwarding when IteratorValue returns an abrupt completion (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [Symbol.iterator, destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    SingleNameBinding : BindingIdentifier Initializeropt
+
+    [...]
+    4. If iteratorRecord.[[done]] is false, then
+       a. Let next be IteratorStep(iteratorRecord.[[iterator]]).
+       b. If next is an abrupt completion, set iteratorRecord.[[done]] to true.
+       c. ReturnIfAbrupt(next).
+       d. If next is false, set iteratorRecord.[[done]] to true.
+       e. Else,
+          i. Let v be IteratorValue(next).
+          ii. If v is an abrupt completion, set iteratorRecord.[[done]] to
+              true.
+          iii. ReturnIfAbrupt(v).
+
+---*/
+var poisonedValue = Object.defineProperty({}, 'value', {
+  get: function() {
+    throw new Test262Error();
+  }
+});
+var g = {};
+g[Symbol.iterator] = function() {
+  return {
+    next: function() {
+      return poisonedValue;
+    }
+  };
+};
+
+var f = function([x] = g) {};
+
+assert.throws(Test262Error, function() {
+  f();
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-id-iter-val.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-id-iter-val.js
new file mode 100644
index 0000000000..75a456f786
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-id-iter-val.js
@@ -0,0 +1,73 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elem-id-iter-val.case
+// - src/dstr-binding/default/func-expr-dflt.template
+/*---
+description: SingleNameBinding when value iteration was completed previously (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    SingleNameBinding : BindingIdentifier Initializeropt
+
+    [...]
+    4. If iteratorRecord.[[done]] is false, then
+       a. Let next be IteratorStep(iteratorRecord.[[iterator]]).
+       b. If next is an abrupt completion, set iteratorRecord.[[done]] to true.
+       c. ReturnIfAbrupt(next).
+       d. If next is false, set iteratorRecord.[[done]] to true.
+       e. Else,
+          [...]
+          i. Let v be IteratorValue(next).
+          ii. If v is an abrupt completion, set
+              iteratorRecord.[[done]] to true.
+          iii. ReturnIfAbrupt(v).
+    5. If iteratorRecord.[[done]] is true, let v be undefined.
+    [...]
+    8. Return InitializeReferencedBinding(lhs, v).
+---*/
+
+var callCount = 0;
+var f;
+f = function([x, y, z] = [1, 2, 3]) {
+  assert.sameValue(x, 1);
+  assert.sameValue(y, 2);
+  assert.sameValue(z, 3);
+  callCount = callCount + 1;
+};
+
+f();
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-obj-id-init.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-obj-id-init.js
new file mode 100644
index 0000000000..d5da147760
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-obj-id-init.js
@@ -0,0 +1,65 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elem-obj-id-init.case
+// - src/dstr-binding/default/func-expr-dflt.template
+/*---
+description: BindingElement with object binding pattern and initializer is used (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    BindingElement : BindingPatternInitializer opt
+
+    [...]
+    2. If iteratorRecord.[[done]] is true, let v be undefined.
+    3. If Initializer is present and v is undefined, then
+       a. Let defaultValue be the result of evaluating Initializer.
+       b. Let v be ? GetValue(defaultValue).
+    4. Return the result of performing BindingInitialization of BindingPattern
+       with v and environment as the arguments.
+---*/
+
+var callCount = 0;
+var f;
+f = function([{ x, y, z } = { x: 44, y: 55, z: 66 }] = []) {
+  assert.sameValue(x, 44);
+  assert.sameValue(y, 55);
+  assert.sameValue(z, 66);
+  callCount = callCount + 1;
+};
+
+f();
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-obj-id.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-obj-id.js
new file mode 100644
index 0000000000..4f704d2995
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-obj-id.js
@@ -0,0 +1,65 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elem-obj-id.case
+// - src/dstr-binding/default/func-expr-dflt.template
+/*---
+description: BindingElement with object binding pattern and initializer is not used (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    BindingElement : BindingPatternInitializer opt
+
+    [...]
+    2. If iteratorRecord.[[done]] is true, let v be undefined.
+    3. If Initializer is present and v is undefined, then
+       a. Let defaultValue be the result of evaluating Initializer.
+       b. Let v be ? GetValue(defaultValue).
+    4. Return the result of performing BindingInitialization of BindingPattern
+       with v and environment as the arguments.
+---*/
+
+var callCount = 0;
+var f;
+f = function([{ x, y, z } = { x: 44, y: 55, z: 66 }] = [{ x: 11, y: 22, z: 33 }]) {
+  assert.sameValue(x, 11);
+  assert.sameValue(y, 22);
+  assert.sameValue(z, 33);
+  callCount = callCount + 1;
+};
+
+f();
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-obj-prop-id-init.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-obj-prop-id-init.js
new file mode 100644
index 0000000000..9ba50914cb
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-obj-prop-id-init.js
@@ -0,0 +1,75 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elem-obj-prop-id-init.case
+// - src/dstr-binding/default/func-expr-dflt.template
+/*---
+description: BindingElement with object binding pattern and initializer is used (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    BindingElement : BindingPatternInitializer opt
+
+    [...]
+    2. If iteratorRecord.[[done]] is true, let v be undefined.
+    3. If Initializer is present and v is undefined, then
+       a. Let defaultValue be the result of evaluating Initializer.
+       b. Let v be ? GetValue(defaultValue).
+    4. Return the result of performing BindingInitialization of BindingPattern
+       with v and environment as the arguments.
+---*/
+
+var callCount = 0;
+var f;
+f = function([{ u: v, w: x, y: z } = { u: 444, w: 555, y: 666 }] = []) {
+  assert.sameValue(v, 444);
+  assert.sameValue(x, 555);
+  assert.sameValue(z, 666);
+
+  assert.throws(ReferenceError, function() {
+    u;
+  });
+  assert.throws(ReferenceError, function() {
+    w;
+  });
+  assert.throws(ReferenceError, function() {
+    y;
+  });
+  callCount = callCount + 1;
+};
+
+f();
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-obj-prop-id.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-obj-prop-id.js
new file mode 100644
index 0000000000..fe893eff00
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-obj-prop-id.js
@@ -0,0 +1,75 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elem-obj-prop-id.case
+// - src/dstr-binding/default/func-expr-dflt.template
+/*---
+description: BindingElement with object binding pattern and initializer is not used (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    BindingElement : BindingPatternInitializer opt
+
+    [...]
+    2. If iteratorRecord.[[done]] is true, let v be undefined.
+    3. If Initializer is present and v is undefined, then
+       a. Let defaultValue be the result of evaluating Initializer.
+       b. Let v be ? GetValue(defaultValue).
+    4. Return the result of performing BindingInitialization of BindingPattern
+       with v and environment as the arguments.
+---*/
+
+var callCount = 0;
+var f;
+f = function([{ u: v, w: x, y: z } = { u: 444, w: 555, y: 666 }] = [{ u: 777, w: 888, y: 999 }]) {
+  assert.sameValue(v, 777);
+  assert.sameValue(x, 888);
+  assert.sameValue(z, 999);
+
+  assert.throws(ReferenceError, function() {
+    u;
+  });
+  assert.throws(ReferenceError, function() {
+    w;
+  });
+  assert.throws(ReferenceError, function() {
+    y;
+  });
+  callCount = callCount + 1;
+};
+
+f();
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-obj-val-null.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-obj-val-null.js
new file mode 100644
index 0000000000..09af32a068
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-obj-val-null.js
@@ -0,0 +1,66 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elem-obj-val-null.case
+// - src/dstr-binding/error/func-expr-dflt.template
+/*---
+description: Nested object destructuring with a null value (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    BindingElement : BindingPattern Initializeropt
+
+    1. If iteratorRecord.[[done]] is false, then
+       [...]
+       e. Else
+          i. Let v be IteratorValue(next).
+          [...]
+    4. Return the result of performing BindingInitialization of BindingPattern
+       with v and environment as the arguments.
+
+    13.3.3.5 Runtime Semantics: BindingInitialization
+
+    BindingPattern : ObjectBindingPattern
+
+    1. Let valid be RequireObjectCoercible(value).
+    2. ReturnIfAbrupt(valid).
+---*/
+
+var f = function([{ x }] = [null]) {};
+
+assert.throws(TypeError, function() {
+  f();
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-obj-val-undef.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-obj-val-undef.js
new file mode 100644
index 0000000000..4b3a535a2b
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-obj-val-undef.js
@@ -0,0 +1,66 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elem-obj-val-undef.case
+// - src/dstr-binding/error/func-expr-dflt.template
+/*---
+description: Nested object destructuring with a value of `undefined` (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    BindingElement : BindingPattern Initializeropt
+
+    1. If iteratorRecord.[[done]] is false, then
+       [...]
+       e. Else
+          i. Let v be IteratorValue(next).
+          [...]
+    4. Return the result of performing BindingInitialization of BindingPattern
+       with v and environment as the arguments.
+
+    13.3.3.5 Runtime Semantics: BindingInitialization
+
+    BindingPattern : ObjectBindingPattern
+
+    1. Let valid be RequireObjectCoercible(value).
+    2. ReturnIfAbrupt(valid).
+---*/
+
+var f = function([{ x }] = []) {};
+
+assert.throws(TypeError, function() {
+  f();
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elision-exhausted.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elision-exhausted.js
new file mode 100644
index 0000000000..7792543226
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elision-exhausted.js
@@ -0,0 +1,70 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elision-exhausted.case
+// - src/dstr-binding/default/func-expr-dflt.template
+/*---
+description: Elision accepts exhausted iterator (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [generators, destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    ArrayBindingPattern : [ Elision ]
+
+    1. Return the result of performing
+       IteratorDestructuringAssignmentEvaluation of Elision with iteratorRecord
+       as the argument.
+
+    12.14.5.3 Runtime Semantics: IteratorDestructuringAssignmentEvaluation
+
+    Elision : ,
+
+    1. If iteratorRecord.[[done]] is false, then
+       [...]
+    2. Return NormalCompletion(empty).
+
+---*/
+var iter = function*() {}();
+iter.next();
+
+var callCount = 0;
+var f;
+f = function([,] = iter) {
+  
+  callCount = callCount + 1;
+};
+
+f();
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elision-step-err.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elision-step-err.js
new file mode 100644
index 0000000000..f498125aa2
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elision-step-err.js
@@ -0,0 +1,73 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elision-step-err.case
+// - src/dstr-binding/error/func-expr-dflt.template
+/*---
+description: Elision advances iterator and forwards abrupt completions (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [generators, destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    ArrayBindingPattern : [ Elision ]
+
+    1. Return the result of performing
+       IteratorDestructuringAssignmentEvaluation of Elision with iteratorRecord
+       as the argument.
+
+    12.14.5.3 Runtime Semantics: IteratorDestructuringAssignmentEvaluation
+
+    Elision : ,
+
+    1. If iteratorRecord.[[done]] is false, then
+       a. Let next be IteratorStep(iteratorRecord.[[iterator]]).
+       b. If next is an abrupt completion, set iteratorRecord.[[done]] to true.
+       c. ReturnIfAbrupt(next).
+
+---*/
+var following = 0;
+var iter =function* () {
+  throw new Test262Error();
+  following += 1;
+}();
+
+var f = function([,] = iter) {};
+
+assert.throws(Test262Error, function() {
+  f();
+});
+
+iter.next();
+assert.sameValue(following, 0, 'Iterator was properly closed.');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elision.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elision.js
new file mode 100644
index 0000000000..cf230f2386
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elision.js
@@ -0,0 +1,79 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elision.case
+// - src/dstr-binding/default/func-expr-dflt.template
+/*---
+description: Elision advances iterator (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [generators, destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    ArrayBindingPattern : [ Elision ]
+
+    1. Return the result of performing
+       IteratorDestructuringAssignmentEvaluation of Elision with iteratorRecord
+       as the argument.
+
+    12.14.5.3 Runtime Semantics: IteratorDestructuringAssignmentEvaluation
+
+    Elision : ,
+
+    1. If iteratorRecord.[[done]] is false, then
+       a. Let next be IteratorStep(iteratorRecord.[[iterator]]).
+       b. If next is an abrupt completion, set iteratorRecord.[[done]] to true.
+       c. ReturnIfAbrupt(next).
+       d. If next is false, set iteratorRecord.[[done]] to true.
+    2. Return NormalCompletion(empty).
+
+---*/
+var first = 0;
+var second = 0;
+function* g() {
+  first += 1;
+  yield;
+  second += 1;
+};
+
+var callCount = 0;
+var f;
+f = function([,] = g()) {
+  assert.sameValue(first, 1);
+  assert.sameValue(second, 0);
+  callCount = callCount + 1;
+};
+
+f();
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-empty.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-empty.js
new file mode 100644
index 0000000000..e19af14d4c
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-empty.js
@@ -0,0 +1,62 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-empty.case
+// - src/dstr-binding/default/func-expr-dflt.template
+/*---
+description: No iteration occurs for an "empty" array binding pattern (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [generators, destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    ArrayBindingPattern : [ ]
+
+    1. Return NormalCompletion(empty).
+
+---*/
+var iterations = 0;
+var iter = function*() {
+  iterations += 1;
+}();
+
+var callCount = 0;
+var f;
+f = function([] = iter) {
+  assert.sameValue(iterations, 0);
+  callCount = callCount + 1;
+};
+
+f();
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-rest-ary-elem.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-rest-ary-elem.js
new file mode 100644
index 0000000000..861cc8858f
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-rest-ary-elem.js
@@ -0,0 +1,86 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-rest-ary-elem.case
+// - src/dstr-binding/default/func-expr-dflt.template
+/*---
+description: Rest element containing an array BindingElementList pattern (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    BindingRestElement : ... BindingPattern
+
+    1. Let A be ArrayCreate(0).
+    [...]
+    3. Repeat
+       [...]
+       b. If iteratorRecord.[[done]] is true, then
+          i. Return the result of performing BindingInitialization of
+             BindingPattern with A and environment as the arguments.
+       [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    SingleNameBinding : BindingIdentifier Initializeropt
+
+    [...]
+    4. If iteratorRecord.[[done]] is false, then
+       a. Let next be IteratorStep(iteratorRecord.[[iterator]]).
+       b. If next is an abrupt completion, set iteratorRecord.[[done]] to true.
+       c. ReturnIfAbrupt(next).
+       d. If next is false, set iteratorRecord.[[done]] to true.
+       e. Else,
+          [...]
+          i. Let v be IteratorValue(next).
+          ii. If v is an abrupt completion, set
+              iteratorRecord.[[done]] to true.
+          iii. ReturnIfAbrupt(v).
+    5. If iteratorRecord.[[done]] is true, let v be undefined.
+    [...]
+    8. Return InitializeReferencedBinding(lhs, v).
+---*/
+
+var callCount = 0;
+var f;
+f = function([...[x, y, z]] = [3, 4, 5]) {
+  assert.sameValue(x, 3);
+  assert.sameValue(y, 4);
+  assert.sameValue(z, 5);
+  callCount = callCount + 1;
+};
+
+f();
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-rest-ary-elision.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-rest-ary-elision.js
new file mode 100644
index 0000000000..deda96d7e4
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-rest-ary-elision.js
@@ -0,0 +1,92 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-rest-ary-elision.case
+// - src/dstr-binding/default/func-expr-dflt.template
+/*---
+description: Rest element containing an elision (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [generators, destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    BindingRestElement : ... BindingPattern
+
+    1. Let A be ArrayCreate(0).
+    [...]
+    3. Repeat
+       [...]
+       b. If iteratorRecord.[[done]] is true, then
+          i. Return the result of performing BindingInitialization of
+             BindingPattern with A and environment as the arguments.
+       [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    ArrayBindingPattern : [ Elision ]
+
+    1. Return the result of performing
+       IteratorDestructuringAssignmentEvaluation of Elision with iteratorRecord
+       as the argument.
+
+    12.14.5.3 Runtime Semantics: IteratorDestructuringAssignmentEvaluation
+
+    Elision : ,
+
+    1. If iteratorRecord.[[done]] is false, then
+       a. Let next be IteratorStep(iteratorRecord.[[iterator]]).
+       b. If next is an abrupt completion, set iteratorRecord.[[done]] to true.
+       c. ReturnIfAbrupt(next).
+       d. If next is false, set iteratorRecord.[[done]] to true.
+    2. Return NormalCompletion(empty).
+
+---*/
+var first = 0;
+var second = 0;
+function* g() {
+  first += 1;
+  yield;
+  second += 1;
+};
+
+var callCount = 0;
+var f;
+f = function([...[,]] = g()) {
+  assert.sameValue(first, 1);
+  assert.sameValue(second, 1);
+  callCount = callCount + 1;
+};
+
+f();
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-rest-ary-empty.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-rest-ary-empty.js
new file mode 100644
index 0000000000..bdf7034c33
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-rest-ary-empty.js
@@ -0,0 +1,75 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-rest-ary-empty.case
+// - src/dstr-binding/default/func-expr-dflt.template
+/*---
+description: Rest element containing an "empty" array pattern (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [generators, destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    BindingRestElement : ... BindingPattern
+
+    1. Let A be ArrayCreate(0).
+    [...]
+    3. Repeat
+       [...]
+       b. If iteratorRecord.[[done]] is true, then
+          i. Return the result of performing BindingInitialization of
+             BindingPattern with A and environment as the arguments.
+       [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    ArrayBindingPattern : [ ]
+
+    1. Return NormalCompletion(empty).
+
+---*/
+var iterations = 0;
+var iter = function*() {
+  iterations += 1;
+}();
+
+var callCount = 0;
+var f;
+f = function([...[]] = iter) {
+  assert.sameValue(iterations, 1);
+  callCount = callCount + 1;
+};
+
+f();
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-rest-ary-rest.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-rest-ary-rest.js
new file mode 100644
index 0000000000..8c34d5fb01
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-rest-ary-rest.js
@@ -0,0 +1,71 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-rest-ary-rest.case
+// - src/dstr-binding/default/func-expr-dflt.template
+/*---
+description: Rest element containing a rest element (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    BindingRestElement : ... BindingPattern
+
+    1. Let A be ArrayCreate(0).
+    [...]
+    3. Repeat
+       [...]
+       b. If iteratorRecord.[[done]] is true, then
+          i. Return the result of performing BindingInitialization of
+             BindingPattern with A and environment as the arguments.
+       [...]
+---*/
+var values = [1, 2, 3];
+
+var callCount = 0;
+var f;
+f = function([...[...x]] = values) {
+  assert(Array.isArray(x));
+  assert.sameValue(x.length, 3);
+  assert.sameValue(x[0], 1);
+  assert.sameValue(x[1], 2);
+  assert.sameValue(x[2], 3);
+  assert.notSameValue(x, values);
+
+  callCount = callCount + 1;
+};
+
+f();
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-rest-id-direct.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-rest-id-direct.js
new file mode 100644
index 0000000000..477530f12f
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-rest-id-direct.js
@@ -0,0 +1,66 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-rest-id-direct.case
+// - src/dstr-binding/default/func-expr-dflt.template
+/*---
+description: Lone rest element (direct binding) (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding, default-parameters]
+flags: [generated]
+includes: [compareArray.js]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    Runtime Semantics: IteratorBindingInitialization
+
+    BindingRestElement : ... BindingIdentifier
+
+    [...]
+    2. Let A be ! ArrayCreate(0).
+    3. Let n be 0.
+    4. Repeat,
+        [...]
+        f. Perform ! CreateDataPropertyOrThrow(A, ! ToString(n), nextValue).
+        g. Set n to n + 1.
+
+---*/
+
+var callCount = 0;
+var f;
+f = function([...x] = [1]) {
+  assert(Array.isArray(x));
+  assert.compareArray(x, [1]);
+  callCount = callCount + 1;
+};
+
+f();
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-rest-id-elision-next-err.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-rest-id-elision-next-err.js
new file mode 100644
index 0000000000..73952b8ec5
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-rest-id-elision-next-err.js
@@ -0,0 +1,59 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-rest-id-elision-next-err.case
+// - src/dstr-binding/error/func-expr-dflt.template
+/*---
+description: Rest element following elision elements (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [generators, destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+    ArrayBindingPattern : [ Elisionopt BindingRestElement ]
+    1. If Elision is present, then
+       a. Let status be the result of performing
+          IteratorDestructuringAssignmentEvaluation of Elision with
+          iteratorRecord as the argument.
+       b. ReturnIfAbrupt(status).
+    2. Return the result of performing IteratorBindingInitialization for
+       BindingRestElement with iteratorRecord and environment as arguments.
+
+---*/
+var iter = (function*() { throw new Test262Error(); })();
+
+var f = function([, ...x] = iter) {};
+
+assert.throws(Test262Error, function() {
+  f();
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-rest-id-elision.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-rest-id-elision.js
new file mode 100644
index 0000000000..58a0567566
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-rest-id-elision.js
@@ -0,0 +1,67 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-rest-id-elision.case
+// - src/dstr-binding/default/func-expr-dflt.template
+/*---
+description: Rest element following elision elements (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+    ArrayBindingPattern : [ Elisionopt BindingRestElement ]
+    1. If Elision is present, then
+       a. Let status be the result of performing
+          IteratorDestructuringAssignmentEvaluation of Elision with
+          iteratorRecord as the argument.
+       b. ReturnIfAbrupt(status).
+    2. Return the result of performing IteratorBindingInitialization for
+       BindingRestElement with iteratorRecord and environment as arguments.
+---*/
+var values = [1, 2, 3, 4, 5];
+
+var callCount = 0;
+var f;
+f = function([ , , ...x] = values) {
+  assert(Array.isArray(x));
+  assert.sameValue(x.length, 3);
+  assert.sameValue(x[0], 3);
+  assert.sameValue(x[1], 4);
+  assert.sameValue(x[2], 5);
+  assert.notSameValue(x, values);
+  callCount = callCount + 1;
+};
+
+f();
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-rest-id-exhausted.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-rest-id-exhausted.js
new file mode 100644
index 0000000000..e67b400ba5
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-rest-id-exhausted.js
@@ -0,0 +1,63 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-rest-id-exhausted.case
+// - src/dstr-binding/default/func-expr-dflt.template
+/*---
+description: RestElement applied to an exhausted iterator (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [Symbol.iterator, destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+    BindingRestElement : ... BindingIdentifier
+    1. Let lhs be ResolveBinding(StringValue of BindingIdentifier,
+       environment).
+    2. ReturnIfAbrupt(lhs). 3. Let A be ArrayCreate(0). 4. Let n=0. 5. Repeat,
+       [...]
+       b. If iteratorRecord.[[done]] is true, then
+          i. If environment is undefined, return PutValue(lhs, A).
+          ii. Return InitializeReferencedBinding(lhs, A).
+
+---*/
+
+var callCount = 0;
+var f;
+f = function([, , ...x] = [1, 2]) {
+  assert(Array.isArray(x));
+  assert.sameValue(x.length, 0);
+  callCount = callCount + 1;
+};
+
+f();
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-rest-id-iter-step-err.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-rest-id-iter-step-err.js
new file mode 100644
index 0000000000..f399cb9547
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-rest-id-iter-step-err.js
@@ -0,0 +1,70 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-rest-id-iter-step-err.case
+// - src/dstr-binding/error/func-expr-dflt.template
+/*---
+description: Error forwarding when IteratorStep returns an abrupt completion (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [generators, destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+    BindingRestElement : ... BindingIdentifier
+    1. Let lhs be ResolveBinding(StringValue of BindingIdentifier,
+       environment).
+    2. ReturnIfAbrupt(lhs). 3. Let A be ArrayCreate(0). 4. Let n=0. 5. Repeat,
+       a. If iteratorRecord.[[done]] is false,
+          i. Let next be IteratorStep(iteratorRecord.[[iterator]]).
+          ii. If next is an abrupt completion, set iteratorRecord.[[done]] to
+              true.
+          iii. ReturnIfAbrupt(next).
+
+---*/
+var first = 0;
+var second = 0;
+var iter = function*() {
+  first += 1;
+  throw new Test262Error();
+  second += 1;
+}();
+
+var f = function([...x] = iter) {};
+
+assert.throws(Test262Error, function() {
+  f();
+});
+
+iter.next();
+assert.sameValue(first, 1);
+assert.sameValue(second, 0, 'Iterator is closed following abrupt completion.');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-rest-id-iter-val-err.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-rest-id-iter-val-err.js
new file mode 100644
index 0000000000..3356dec995
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-rest-id-iter-val-err.js
@@ -0,0 +1,72 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-rest-id-iter-val-err.case
+// - src/dstr-binding/error/func-expr-dflt.template
+/*---
+description: Error forwarding when IteratorValue returns an abrupt completion (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [Symbol.iterator, destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+    BindingRestElement : ... BindingIdentifier
+    1. Let lhs be ResolveBinding(StringValue of BindingIdentifier,
+       environment).
+    2. ReturnIfAbrupt(lhs). 3. Let A be ArrayCreate(0). 4. Let n=0. 5. Repeat,
+       [...]
+       c. Let nextValue be IteratorValue(next).
+       d. If nextValue is an abrupt completion, set iteratorRecord.[[done]] to
+          true.
+       e. ReturnIfAbrupt(nextValue).
+
+---*/
+var poisonedValue = Object.defineProperty({}, 'value', {
+  get: function() {
+    throw new Test262Error();
+  }
+});
+var iter = {};
+iter[Symbol.iterator] = function() {
+  return {
+    next: function() {
+      return poisonedValue;
+    }
+  };
+};
+
+var f = function([...x] = iter) {};
+
+assert.throws(Test262Error, function() {
+  f();
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-rest-id.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-rest-id.js
new file mode 100644
index 0000000000..a98268c917
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-rest-id.js
@@ -0,0 +1,64 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-rest-id.case
+// - src/dstr-binding/default/func-expr-dflt.template
+/*---
+description: Lone rest element (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+    BindingRestElement : ... BindingIdentifier
+    [...] 3. Let A be ArrayCreate(0). [...] 5. Repeat
+       [...]
+       f. Let status be CreateDataProperty(A, ToString (n), nextValue).
+       [...]
+---*/
+var values = [1, 2, 3];
+
+var callCount = 0;
+var f;
+f = function([...x] = values) {
+  assert(Array.isArray(x));
+  assert.sameValue(x.length, 3);
+  assert.sameValue(x[0], 1);
+  assert.sameValue(x[1], 2);
+  assert.sameValue(x[2], 3);
+  assert.notSameValue(x, values);
+  callCount = callCount + 1;
+};
+
+f();
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-rest-init-ary.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-rest-init-ary.js
new file mode 100644
index 0000000000..a26e3fcb0a
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-rest-init-ary.js
@@ -0,0 +1,60 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-rest-init-ary.case
+// - src/dstr-binding/default/func-expr-dflt.template
+/*---
+description: Rest element (nested array pattern) does not support initializer (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding, default-parameters]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3 Destructuring Binding Patterns
+    ArrayBindingPattern[Yield] :
+        [ Elisionopt BindingRestElement[?Yield]opt ]
+        [ BindingElementList[?Yield] ]
+        [ BindingElementList[?Yield] , Elisionopt BindingRestElement[?Yield]opt ]
+---*/
+$DONOTEVALUATE();
+
+var callCount = 0;
+var f;
+f = function([...[ x ] = []] = []) {
+  
+  callCount = callCount + 1;
+};
+
+f();
+assert.sameValue(callCount, 1, 'function invoked exactly once');
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-rest-init-id.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-rest-init-id.js
new file mode 100644
index 0000000000..cb6668ccea
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-rest-init-id.js
@@ -0,0 +1,60 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-rest-init-id.case
+// - src/dstr-binding/default/func-expr-dflt.template
+/*---
+description: Rest element (identifier) does not support initializer (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding, default-parameters]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3 Destructuring Binding Patterns
+    ArrayBindingPattern[Yield] :
+        [ Elisionopt BindingRestElement[?Yield]opt ]
+        [ BindingElementList[?Yield] ]
+        [ BindingElementList[?Yield] , Elisionopt BindingRestElement[?Yield]opt ]
+---*/
+$DONOTEVALUATE();
+
+var callCount = 0;
+var f;
+f = function([...x = []] = []) {
+  
+  callCount = callCount + 1;
+};
+
+f();
+assert.sameValue(callCount, 1, 'function invoked exactly once');
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-rest-init-obj.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-rest-init-obj.js
new file mode 100644
index 0000000000..b654efce51
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-rest-init-obj.js
@@ -0,0 +1,60 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-rest-init-obj.case
+// - src/dstr-binding/default/func-expr-dflt.template
+/*---
+description: Rest element (nested object pattern) does not support initializer (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding, default-parameters]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3 Destructuring Binding Patterns
+    ArrayBindingPattern[Yield] :
+        [ Elisionopt BindingRestElement[?Yield]opt ]
+        [ BindingElementList[?Yield] ]
+        [ BindingElementList[?Yield] , Elisionopt BindingRestElement[?Yield]opt ]
+---*/
+$DONOTEVALUATE();
+
+var callCount = 0;
+var f;
+f = function([...{ x } = []] = []) {
+  
+  callCount = callCount + 1;
+};
+
+f();
+assert.sameValue(callCount, 1, 'function invoked exactly once');
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-rest-not-final-ary.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-rest-not-final-ary.js
new file mode 100644
index 0000000000..d3b8c0dc3c
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-rest-not-final-ary.js
@@ -0,0 +1,60 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-rest-not-final-ary.case
+// - src/dstr-binding/default/func-expr-dflt.template
+/*---
+description: Rest element (array binding pattern) may not be followed by any element (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding, default-parameters]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3 Destructuring Binding Patterns
+    ArrayBindingPattern[Yield] :
+        [ Elisionopt BindingRestElement[?Yield]opt ]
+        [ BindingElementList[?Yield] ]
+        [ BindingElementList[?Yield] , Elisionopt BindingRestElement[?Yield]opt ]
+---*/
+$DONOTEVALUATE();
+
+var callCount = 0;
+var f;
+f = function([...[x], y] = [1, 2, 3]) {
+  
+  callCount = callCount + 1;
+};
+
+f();
+assert.sameValue(callCount, 1, 'function invoked exactly once');
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-rest-not-final-id.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-rest-not-final-id.js
new file mode 100644
index 0000000000..cfefd556a5
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-rest-not-final-id.js
@@ -0,0 +1,60 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-rest-not-final-id.case
+// - src/dstr-binding/default/func-expr-dflt.template
+/*---
+description: Rest element (identifier) may not be followed by any element (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding, default-parameters]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3 Destructuring Binding Patterns
+    ArrayBindingPattern[Yield] :
+        [ Elisionopt BindingRestElement[?Yield]opt ]
+        [ BindingElementList[?Yield] ]
+        [ BindingElementList[?Yield] , Elisionopt BindingRestElement[?Yield]opt ]
+---*/
+$DONOTEVALUATE();
+
+var callCount = 0;
+var f;
+f = function([...x, y] = [1, 2, 3]) {
+  
+  callCount = callCount + 1;
+};
+
+f();
+assert.sameValue(callCount, 1, 'function invoked exactly once');
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-rest-not-final-obj.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-rest-not-final-obj.js
new file mode 100644
index 0000000000..80ebd93ce0
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-rest-not-final-obj.js
@@ -0,0 +1,60 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-rest-not-final-obj.case
+// - src/dstr-binding/default/func-expr-dflt.template
+/*---
+description: Rest element (object binding pattern) may not be followed by any element (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding, default-parameters]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3 Destructuring Binding Patterns
+    ArrayBindingPattern[Yield] :
+        [ Elisionopt BindingRestElement[?Yield]opt ]
+        [ BindingElementList[?Yield] ]
+        [ BindingElementList[?Yield] , Elisionopt BindingRestElement[?Yield]opt ]
+---*/
+$DONOTEVALUATE();
+
+var callCount = 0;
+var f;
+f = function([...{ x }, y] = [1, 2, 3]) {
+  
+  callCount = callCount + 1;
+};
+
+f();
+assert.sameValue(callCount, 1, 'function invoked exactly once');
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-rest-obj-id.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-rest-obj-id.js
new file mode 100644
index 0000000000..6a708643a0
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-rest-obj-id.js
@@ -0,0 +1,64 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-rest-obj-id.case
+// - src/dstr-binding/default/func-expr-dflt.template
+/*---
+description: Rest element containing an object binding pattern (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    BindingRestElement : ... BindingPattern
+
+    1. Let A be ArrayCreate(0).
+    [...]
+    3. Repeat
+       [...]
+       b. If iteratorRecord.[[done]] is true, then
+          i. Return the result of performing BindingInitialization of
+             BindingPattern with A and environment as the arguments.
+       [...]
+---*/
+
+var callCount = 0;
+var f;
+f = function([...{ length }] = [1, 2, 3]) {
+  assert.sameValue(length, 3);
+  callCount = callCount + 1;
+};
+
+f();
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-rest-obj-prop-id.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-rest-obj-prop-id.js
new file mode 100644
index 0000000000..15497db7b2
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-rest-obj-prop-id.js
@@ -0,0 +1,71 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-rest-obj-prop-id.case
+// - src/dstr-binding/default/func-expr-dflt.template
+/*---
+description: Rest element containing an object binding pattern (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    BindingRestElement : ... BindingPattern
+
+    1. Let A be ArrayCreate(0).
+    [...]
+    3. Repeat
+       [...]
+       b. If iteratorRecord.[[done]] is true, then
+          i. Return the result of performing BindingInitialization of
+             BindingPattern with A and environment as the arguments.
+       [...]
+---*/
+let length = "outer";
+
+var callCount = 0;
+var f;
+f = function([...{ 0: v, 1: w, 2: x, 3: y, length: z }] = [7, 8, 9]) {
+  assert.sameValue(v, 7);
+  assert.sameValue(w, 8);
+  assert.sameValue(x, 9);
+  assert.sameValue(y, undefined);
+  assert.sameValue(z, 3);
+
+  assert.sameValue(length, "outer", "the length prop is not set as a binding name");
+  callCount = callCount + 1;
+};
+
+f();
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-init-null.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-init-null.js
new file mode 100644
index 0000000000..39ff450035
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-init-null.js
@@ -0,0 +1,53 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/obj-init-null.case
+// - src/dstr-binding/error/func-expr-dflt.template
+/*---
+description: Value specifed for object binding pattern must be object coercible (null) (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    Runtime Semantics: BindingInitialization
+
+    ObjectBindingPattern : { }
+
+    1. Return NormalCompletion(empty).
+---*/
+
+var f = function({} = null) {};
+
+assert.throws(TypeError, function() {
+  f();
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-init-undefined.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-init-undefined.js
new file mode 100644
index 0000000000..067c51ec7f
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-init-undefined.js
@@ -0,0 +1,53 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/obj-init-undefined.case
+// - src/dstr-binding/error/func-expr-dflt.template
+/*---
+description: Value specifed for object binding pattern must be object coercible (undefined) (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    Runtime Semantics: BindingInitialization
+
+    ObjectBindingPattern : { }
+
+    1. Return NormalCompletion(empty).
+---*/
+
+var f = function({} = undefined) {};
+
+assert.throws(TypeError, function() {
+  f();
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-empty.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-empty.js
new file mode 100644
index 0000000000..ff313f6465
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-empty.js
@@ -0,0 +1,63 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/obj-ptrn-empty.case
+// - src/dstr-binding/default/func-expr-dflt.template
+/*---
+description: No property access occurs for an "empty" object binding pattern (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    Runtime Semantics: BindingInitialization
+
+    ObjectBindingPattern : { }
+
+    1. Return NormalCompletion(empty).
+---*/
+var accessCount = 0;
+var obj = Object.defineProperty({}, 'attr', {
+  get: function() {
+    accessCount += 1;
+  }
+});
+
+var callCount = 0;
+var f;
+f = function({} = obj) {
+  assert.sameValue(accessCount, 0);
+  callCount = callCount + 1;
+};
+
+f();
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-id-get-value-err.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-id-get-value-err.js
new file mode 100644
index 0000000000..df1a49b049
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-id-get-value-err.js
@@ -0,0 +1,60 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/obj-ptrn-id-get-value-err.case
+// - src/dstr-binding/error/func-expr-dflt.template
+/*---
+description: Error thrown when accessing the corresponding property of the value object (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.7 Runtime Semantics: KeyedBindingInitialization
+
+    SingleNameBinding : BindingIdentifier Initializeropt
+
+    [...]
+    4. Let v be GetV(value, propertyName).
+    5. ReturnIfAbrupt(v).
+---*/
+var poisonedProperty = Object.defineProperty({}, 'poisoned', {
+  get: function() {
+    throw new Test262Error();
+  }
+});
+
+var f = function({ poisoned } = poisonedProperty) {};
+
+assert.throws(Test262Error, function() {
+  f();
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-id-init-fn-name-arrow.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-id-init-fn-name-arrow.js
new file mode 100644
index 0000000000..f4ed156c43
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-id-init-fn-name-arrow.js
@@ -0,0 +1,64 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/obj-ptrn-id-init-fn-name-arrow.case
+// - src/dstr-binding/default/func-expr-dflt.template
+/*---
+description: SingleNameBinding assigns `name` to arrow functions (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.7 Runtime Semantics: KeyedBindingInitialization
+
+    SingleNameBinding : BindingIdentifier Initializeropt
+
+    [...]
+    6. If Initializer is present and v is undefined, then
+       [...]
+       d. If IsAnonymousFunctionDefinition(Initializer) is true, then
+          i. Let hasNameProperty be HasOwnProperty(v, "name").
+          ii. ReturnIfAbrupt(hasNameProperty).
+          iii. If hasNameProperty is false, perform SetFunctionName(v,
+               bindingId).
+---*/
+
+var callCount = 0;
+var f;
+f = function({ arrow = () => {} } = {}) {
+  assert.sameValue(arrow.name, 'arrow');
+  callCount = callCount + 1;
+};
+
+f();
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-id-init-fn-name-class.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-id-init-fn-name-class.js
new file mode 100644
index 0000000000..26bbfd3130
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-id-init-fn-name-class.js
@@ -0,0 +1,66 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/obj-ptrn-id-init-fn-name-class.case
+// - src/dstr-binding/default/func-expr-dflt.template
+/*---
+description: SingleNameBinding assigns `name` to "anonymous" classes (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.7 Runtime Semantics: KeyedBindingInitialization
+
+    SingleNameBinding : BindingIdentifier Initializeropt
+
+    [...]
+    6. If Initializer is present and v is undefined, then
+       [...]
+       d. If IsAnonymousFunctionDefinition(Initializer) is true, then
+          i. Let hasNameProperty be HasOwnProperty(v, "name").
+          ii. ReturnIfAbrupt(hasNameProperty).
+          iii. If hasNameProperty is false, perform SetFunctionName(v,
+               bindingId).
+---*/
+
+var callCount = 0;
+var f;
+f = function({ cls = class {}, xCls = class X {}, xCls2 = class { static name() {} } } = {}) {
+  assert.sameValue(cls.name, 'cls');
+  assert.notSameValue(xCls.name, 'xCls');
+  assert.notSameValue(xCls2.name, 'xCls2');
+  callCount = callCount + 1;
+};
+
+f();
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-id-init-fn-name-cover.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-id-init-fn-name-cover.js
new file mode 100644
index 0000000000..5ca05b670f
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-id-init-fn-name-cover.js
@@ -0,0 +1,65 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/obj-ptrn-id-init-fn-name-cover.case
+// - src/dstr-binding/default/func-expr-dflt.template
+/*---
+description: SingleNameBinding assigns `name` to "anonymous" functions "through" cover grammar (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.7 Runtime Semantics: KeyedBindingInitialization
+
+    SingleNameBinding : BindingIdentifier Initializeropt
+
+    [...]
+    6. If Initializer is present and v is undefined, then
+       [...]
+       d. If IsAnonymousFunctionDefinition(Initializer) is true, then
+          i. Let hasNameProperty be HasOwnProperty(v, "name").
+          ii. ReturnIfAbrupt(hasNameProperty).
+          iii. If hasNameProperty is false, perform SetFunctionName(v,
+               bindingId).
+---*/
+
+var callCount = 0;
+var f;
+f = function({ cover = (function () {}), xCover = (0, function() {})  } = {}) {
+  assert.sameValue(cover.name, 'cover');
+  assert.notSameValue(xCover.name, 'xCover');
+  callCount = callCount + 1;
+};
+
+f();
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-id-init-fn-name-fn.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-id-init-fn-name-fn.js
new file mode 100644
index 0000000000..87ebbd0db8
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-id-init-fn-name-fn.js
@@ -0,0 +1,65 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/obj-ptrn-id-init-fn-name-fn.case
+// - src/dstr-binding/default/func-expr-dflt.template
+/*---
+description: SingleNameBinding assigns name to "anonymous" functions (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.7 Runtime Semantics: KeyedBindingInitialization
+
+    SingleNameBinding : BindingIdentifier Initializeropt
+
+    [...]
+    6. If Initializer is present and v is undefined, then
+       [...]
+       d. If IsAnonymousFunctionDefinition(Initializer) is true, then
+          i. Let hasNameProperty be HasOwnProperty(v, "name").
+          ii. ReturnIfAbrupt(hasNameProperty).
+          iii. If hasNameProperty is false, perform SetFunctionName(v,
+               bindingId).
+---*/
+
+var callCount = 0;
+var f;
+f = function({ fn = function () {}, xFn = function x() {} } = {}) {
+  assert.sameValue(fn.name, 'fn');
+  assert.notSameValue(xFn.name, 'xFn');
+  callCount = callCount + 1;
+};
+
+f();
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-id-init-fn-name-gen.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-id-init-fn-name-gen.js
new file mode 100644
index 0000000000..ce56f7ff23
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-id-init-fn-name-gen.js
@@ -0,0 +1,66 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/obj-ptrn-id-init-fn-name-gen.case
+// - src/dstr-binding/default/func-expr-dflt.template
+/*---
+description: SingleNameBinding assigns name to "anonymous" generator functions (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [generators, destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.7 Runtime Semantics: KeyedBindingInitialization
+
+    SingleNameBinding : BindingIdentifier Initializeropt
+
+    [...]
+    6. If Initializer is present and v is undefined, then
+       [...]
+       d. If IsAnonymousFunctionDefinition(Initializer) is true, then
+          i. Let hasNameProperty be HasOwnProperty(v, "name").
+          ii. ReturnIfAbrupt(hasNameProperty).
+          iii. If hasNameProperty is false, perform SetFunctionName(v,
+               bindingId).
+
+---*/
+
+var callCount = 0;
+var f;
+f = function({ gen = function* () {}, xGen = function* x() {} } = {}) {
+  assert.sameValue(gen.name, 'gen');
+  assert.notSameValue(xGen.name, 'xGen');
+  callCount = callCount + 1;
+};
+
+f();
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-id-init-skipped.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-id-init-skipped.js
new file mode 100644
index 0000000000..0e720d6a6e
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-id-init-skipped.js
@@ -0,0 +1,68 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/obj-ptrn-id-init-skipped.case
+// - src/dstr-binding/default/func-expr-dflt.template
+/*---
+description: Destructuring initializer is not evaluated when value is not `undefined` (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.7 Runtime Semantics: KeyedBindingInitialization
+
+    SingleNameBinding : BindingIdentifier Initializeropt
+
+    [...]
+    6. If Initializer is present and v is undefined, then
+       [...]
+    [...]
+---*/
+var initCount = 0;
+function counter() {
+  initCount += 1;
+}
+
+var callCount = 0;
+var f;
+f = function({ w = counter(), x = counter(), y = counter(), z = counter() } = { w: null, x: 0, y: false, z: '' }) {
+  assert.sameValue(w, null);
+  assert.sameValue(x, 0);
+  assert.sameValue(y, false);
+  assert.sameValue(z, '');
+  assert.sameValue(initCount, 0);
+  callCount = callCount + 1;
+};
+
+f();
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-id-init-throws.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-id-init-throws.js
new file mode 100644
index 0000000000..bb9cb31969
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-id-init-throws.js
@@ -0,0 +1,60 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/obj-ptrn-id-init-throws.case
+// - src/dstr-binding/error/func-expr-dflt.template
+/*---
+description: Error thrown when evaluating the initializer (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.7 Runtime Semantics: KeyedBindingInitialization
+
+    SingleNameBinding : BindingIdentifier Initializeropt
+
+    [...]
+    6. If Initializer is present and v is undefined, then
+       a. Let  defaultValue be the result of evaluating Initializer.
+       b. Let v be GetValue(defaultValue).
+       c. ReturnIfAbrupt(v).
+---*/
+function thrower() {
+  throw new Test262Error();
+}
+
+var f = function({ x = thrower() } = {}) {};
+
+assert.throws(Test262Error, function() {
+  f();
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-id-init-unresolvable.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-id-init-unresolvable.js
new file mode 100644
index 0000000000..1f30fd328d
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-id-init-unresolvable.js
@@ -0,0 +1,64 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/obj-ptrn-id-init-unresolvable.case
+// - src/dstr-binding/error/func-expr-dflt.template
+/*---
+description: Destructuring initializer is an unresolvable reference (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.7 Runtime Semantics: KeyedBindingInitialization
+
+    SingleNameBinding : BindingIdentifier Initializeropt
+
+    [...]
+    6. If Initializer is present and v is undefined, then
+       a. Let defaultValue be the result of evaluating Initializer.
+       b. Let v be GetValue(defaultValue).
+       c. ReturnIfAbrupt(v).
+
+    6.2.3.1 GetValue (V)
+
+    1. ReturnIfAbrupt(V).
+    2. If Type(V) is not Reference, return V.
+    3. Let base be GetBase(V).
+    4. If IsUnresolvableReference(V), throw a ReferenceError exception.
+---*/
+
+var f = function({ x = unresolvableReference } = {}) {};
+
+assert.throws(ReferenceError, function() {
+  f();
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-id-trailing-comma.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-id-trailing-comma.js
new file mode 100644
index 0000000000..ca164ee83d
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-id-trailing-comma.js
@@ -0,0 +1,58 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/obj-ptrn-id-trailing-comma.case
+// - src/dstr-binding/default/func-expr-dflt.template
+/*---
+description: Trailing comma is allowed following BindingPropertyList (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3 Destructuring Binding Patterns
+
+    ObjectBindingPattern[Yield] :
+        { }
+        { BindingPropertyList[?Yield] }
+        { BindingPropertyList[?Yield] , }
+---*/
+
+var callCount = 0;
+var f;
+f = function({ x, } = { x: 23 }) {
+  assert.sameValue(x, 23);
+  callCount = callCount + 1;
+};
+
+f();
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-list-err.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-list-err.js
new file mode 100644
index 0000000000..c474937463
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-list-err.js
@@ -0,0 +1,61 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/obj-ptrn-list-err.case
+// - src/dstr-binding/error/func-expr-dflt.template
+/*---
+description: Binding property list evaluation is interrupted by an abrupt completion (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.5 Runtime Semantics: BindingInitialization
+
+    BindingPropertyList : BindingPropertyList , BindingProperty
+
+    1. Let status be the result of performing BindingInitialization for
+       BindingPropertyList using value and environment as arguments.
+    2. ReturnIfAbrupt(status).
+---*/
+var initCount = 0;
+function thrower() {
+  throw new Test262Error();
+}
+
+var f = function({ a, b = thrower(), c = ++initCount } = {}) {};
+
+assert.throws(Test262Error, function() {
+  f();
+});
+
+assert.sameValue(initCount, 0);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-prop-ary-init.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-prop-ary-init.js
new file mode 100644
index 0000000000..94513c1e22
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-prop-ary-init.js
@@ -0,0 +1,67 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/obj-ptrn-prop-ary-init.case
+// - src/dstr-binding/default/func-expr-dflt.template
+/*---
+description: Object binding pattern with "nested" array binding pattern using initializer (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.7 Runtime Semantics: KeyedBindingInitialization
+
+    [...]
+    3. If Initializer is present and v is undefined, then
+       a. Let defaultValue be the result of evaluating Initializer.
+       b. Let v be GetValue(defaultValue).
+       c. ReturnIfAbrupt(v).
+    4. Return the result of performing BindingInitialization for BindingPattern
+       passing v and environment as arguments.
+---*/
+
+var callCount = 0;
+var f;
+f = function({ w: [x, y, z] = [4, 5, 6] } = {}) {
+  assert.sameValue(x, 4);
+  assert.sameValue(y, 5);
+  assert.sameValue(z, 6);
+
+  assert.throws(ReferenceError, function() {
+    w;
+  });
+  callCount = callCount + 1;
+};
+
+f();
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-prop-ary-trailing-comma.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-prop-ary-trailing-comma.js
new file mode 100644
index 0000000000..1082c765a4
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-prop-ary-trailing-comma.js
@@ -0,0 +1,58 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/obj-ptrn-prop-ary-trailing-comma.case
+// - src/dstr-binding/default/func-expr-dflt.template
+/*---
+description: Trailing comma is allowed following BindingPropertyList (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3 Destructuring Binding Patterns
+
+    ObjectBindingPattern[Yield] :
+        { }
+        { BindingPropertyList[?Yield] }
+        { BindingPropertyList[?Yield] , }
+---*/
+
+var callCount = 0;
+var f;
+f = function({ x: [y], } = { x: [45] }) {
+  assert.sameValue(y,45);
+  callCount = callCount + 1;
+};
+
+f();
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-prop-ary-value-null.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-prop-ary-value-null.js
new file mode 100644
index 0000000000..b502dccac1
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-prop-ary-value-null.js
@@ -0,0 +1,55 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/obj-ptrn-prop-ary-value-null.case
+// - src/dstr-binding/error/func-expr-dflt.template
+/*---
+description: Object binding pattern with "nested" array binding pattern taking the `null` value (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.7 Runtime Semantics: KeyedBindingInitialization
+
+    [...]
+    3. If Initializer is present and v is undefined, then
+       [...]
+    4. Return the result of performing BindingInitialization for BindingPattern
+       passing v and environment as arguments.
+---*/
+
+var f = function({ w: [x, y, z] = [4, 5, 6] } = { w: null }) {};
+
+assert.throws(TypeError, function() {
+  f();
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-prop-ary.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-prop-ary.js
new file mode 100644
index 0000000000..6ba8fca917
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-prop-ary.js
@@ -0,0 +1,65 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/obj-ptrn-prop-ary.case
+// - src/dstr-binding/default/func-expr-dflt.template
+/*---
+description: Object binding pattern with "nested" array binding pattern not using initializer (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.7 Runtime Semantics: KeyedBindingInitialization
+
+    [...]
+    3. If Initializer is present and v is undefined, then
+       [...]
+    4. Return the result of performing BindingInitialization for BindingPattern
+       passing v and environment as arguments.
+---*/
+
+var callCount = 0;
+var f;
+f = function({ w: [x, y, z] = [4, 5, 6] } = { w: [7, undefined, ] }) {
+  assert.sameValue(x, 7);
+  assert.sameValue(y, undefined);
+  assert.sameValue(z, undefined);
+
+  assert.throws(ReferenceError, function() {
+    w;
+  });
+  callCount = callCount + 1;
+};
+
+f();
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-prop-eval-err.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-prop-eval-err.js
new file mode 100644
index 0000000000..d51f98ee29
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-prop-eval-err.js
@@ -0,0 +1,57 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/obj-ptrn-prop-eval-err.case
+// - src/dstr-binding/error/func-expr-dflt.template
+/*---
+description: Evaluation of property name returns an abrupt completion (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.5 Runtime Semantics: BindingInitialization
+
+    BindingProperty : PropertyName : BindingElement
+
+    1. Let P be the result of evaluating PropertyName
+    2. ReturnIfAbrupt(P).
+---*/
+function thrower() {
+  throw new Test262Error();
+}
+
+var f = function({ [thrower()]: x } = {}) {};
+
+assert.throws(Test262Error, function() {
+  f();
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-prop-id-get-value-err.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-prop-id-get-value-err.js
new file mode 100644
index 0000000000..62b1a90946
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-prop-id-get-value-err.js
@@ -0,0 +1,62 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/obj-ptrn-prop-id-get-value-err.case
+// - src/dstr-binding/error/func-expr-dflt.template
+/*---
+description: Error thrown when accessing the corresponding property of the value object (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.7 Runtime Semantics: KeyedBindingInitialization
+
+    BindingElement : BindingPattern Initializeropt
+
+    1. Let v be GetV(value, propertyName).
+    2. ReturnIfAbrupt(v).
+---*/
+var initEvalCount = 0;
+var poisonedProperty = Object.defineProperty({}, 'poisoned', {
+  get: function() {
+    throw new Test262Error();
+  }
+});
+
+var f = function({ poisoned: x = ++initEvalCount } = poisonedProperty) {};
+
+assert.throws(Test262Error, function() {
+  f();
+});
+
+assert.sameValue(initEvalCount, 0);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-prop-id-init-skipped.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-prop-id-init-skipped.js
new file mode 100644
index 0000000000..bb5d788af7
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-prop-id-init-skipped.js
@@ -0,0 +1,80 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/obj-ptrn-prop-id-init-skipped.case
+// - src/dstr-binding/default/func-expr-dflt.template
+/*---
+description: Destructuring initializer is not evaluated when value is not `undefined` (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.7 Runtime Semantics: KeyedBindingInitialization
+
+    BindingElement : BindingPattern Initializeropt
+
+    [...]
+    3. If Initializer is present and v is undefined, then
+    [...]
+---*/
+var initCount = 0;
+function counter() {
+  initCount += 1;
+}
+
+var callCount = 0;
+var f;
+f = function({ s: t = counter(), u: v = counter(), w: x = counter(), y: z = counter() } = { s: null, u: 0, w: false, y: '' }) {
+  assert.sameValue(t, null);
+  assert.sameValue(v, 0);
+  assert.sameValue(x, false);
+  assert.sameValue(z, '');
+  assert.sameValue(initCount, 0);
+
+  assert.throws(ReferenceError, function() {
+    s;
+  });
+  assert.throws(ReferenceError, function() {
+    u;
+  });
+  assert.throws(ReferenceError, function() {
+    w;
+  });
+  assert.throws(ReferenceError, function() {
+    y;
+  });
+  callCount = callCount + 1;
+};
+
+f();
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-prop-id-init-throws.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-prop-id-init-throws.js
new file mode 100644
index 0000000000..a9b56e6ce1
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-prop-id-init-throws.js
@@ -0,0 +1,60 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/obj-ptrn-prop-id-init-throws.case
+// - src/dstr-binding/error/func-expr-dflt.template
+/*---
+description: Error thrown when evaluating the initializer (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.7 Runtime Semantics: KeyedBindingInitialization
+
+    BindingElement : BindingPattern Initializeropt
+
+    [...]
+    3. If Initializer is present and v is undefined, then
+       a. Let defaultValue be the result of evaluating Initializer.
+       b. Let v be GetValue(defaultValue).
+       c. ReturnIfAbrupt(v).
+---*/
+function thrower() {
+  throw new Test262Error();
+}
+
+var f = function({ x: y = thrower() } = {}) {};
+
+assert.throws(Test262Error, function() {
+  f();
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-prop-id-init-unresolvable.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-prop-id-init-unresolvable.js
new file mode 100644
index 0000000000..ad657f957c
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-prop-id-init-unresolvable.js
@@ -0,0 +1,64 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/obj-ptrn-prop-id-init-unresolvable.case
+// - src/dstr-binding/error/func-expr-dflt.template
+/*---
+description: Destructuring initializer is an unresolvable reference (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.7 Runtime Semantics: KeyedBindingInitialization
+
+    BindingElement : BindingPattern Initializeropt
+
+    [...]
+    3. If Initializer is present and v is undefined, then
+       a. Let defaultValue be the result of evaluating Initializer.
+       b. Let v be GetValue(defaultValue).
+       c. ReturnIfAbrupt(v).
+
+    6.2.3.1 GetValue (V)
+
+    1. ReturnIfAbrupt(V).
+    2. If Type(V) is not Reference, return V.
+    3. Let base be GetBase(V).
+    4. If IsUnresolvableReference(V), throw a ReferenceError exception.
+---*/
+
+var f = function({ x: y = unresolvableReference } = {}) {};
+
+assert.throws(ReferenceError, function() {
+  f();
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-prop-id-init.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-prop-id-init.js
new file mode 100644
index 0000000000..4ce963ec7c
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-prop-id-init.js
@@ -0,0 +1,61 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/obj-ptrn-prop-id-init.case
+// - src/dstr-binding/default/func-expr-dflt.template
+/*---
+description: Binding as specified via property name, identifier, and initializer (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.7 Runtime Semantics: KeyedBindingInitialization
+
+    SingleNameBinding : BindingIdentifier Initializeropt
+
+    [...]
+    8. Return InitializeReferencedBinding(lhs, v).
+---*/
+
+var callCount = 0;
+var f;
+f = function({ x: y = 33 } = { }) {
+  assert.sameValue(y, 33);
+  assert.throws(ReferenceError, function() {
+    x;
+  });
+  callCount = callCount + 1;
+};
+
+f();
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-prop-id-trailing-comma.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-prop-id-trailing-comma.js
new file mode 100644
index 0000000000..45db6b64d2
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-prop-id-trailing-comma.js
@@ -0,0 +1,62 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/obj-ptrn-prop-id-trailing-comma.case
+// - src/dstr-binding/default/func-expr-dflt.template
+/*---
+description: Trailing comma is allowed following BindingPropertyList (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3 Destructuring Binding Patterns
+
+    ObjectBindingPattern[Yield] :
+        { }
+        { BindingPropertyList[?Yield] }
+        { BindingPropertyList[?Yield] , }
+---*/
+
+var callCount = 0;
+var f;
+f = function({ x: y, } = { x: 23 }) {
+  assert.sameValue(y, 23);
+
+  assert.throws(ReferenceError, function() {
+    x;
+  });
+  callCount = callCount + 1;
+};
+
+f();
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-prop-id.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-prop-id.js
new file mode 100644
index 0000000000..f947966f79
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-prop-id.js
@@ -0,0 +1,61 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/obj-ptrn-prop-id.case
+// - src/dstr-binding/default/func-expr-dflt.template
+/*---
+description: Binding as specified via property name and identifier (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.7 Runtime Semantics: KeyedBindingInitialization
+
+    SingleNameBinding : BindingIdentifier Initializeropt
+
+    [...]
+    8. Return InitializeReferencedBinding(lhs, v).
+---*/
+
+var callCount = 0;
+var f;
+f = function({ x: y } = { x: 23 }) {
+  assert.sameValue(y, 23);
+  assert.throws(ReferenceError, function() {
+    x;
+  });
+  callCount = callCount + 1;
+};
+
+f();
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-prop-obj-init.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-prop-obj-init.js
new file mode 100644
index 0000000000..a49217e15c
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-prop-obj-init.js
@@ -0,0 +1,67 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/obj-ptrn-prop-obj-init.case
+// - src/dstr-binding/default/func-expr-dflt.template
+/*---
+description: Object binding pattern with "nested" object binding pattern using initializer (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.7 Runtime Semantics: KeyedBindingInitialization
+
+    [...]
+    3. If Initializer is present and v is undefined, then
+       a. Let defaultValue be the result of evaluating Initializer.
+       b. Let v be GetValue(defaultValue).
+       c. ReturnIfAbrupt(v).
+    4. Return the result of performing BindingInitialization for BindingPattern
+       passing v and environment as arguments.
+---*/
+
+var callCount = 0;
+var f;
+f = function({ w: { x, y, z } = { x: 4, y: 5, z: 6 } } = { w: undefined }) {
+  assert.sameValue(x, 4);
+  assert.sameValue(y, 5);
+  assert.sameValue(z, 6);
+
+  assert.throws(ReferenceError, function() {
+    w;
+  });
+  callCount = callCount + 1;
+};
+
+f();
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-prop-obj-value-null.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-prop-obj-value-null.js
new file mode 100644
index 0000000000..d323e25d38
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-prop-obj-value-null.js
@@ -0,0 +1,55 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/obj-ptrn-prop-obj-value-null.case
+// - src/dstr-binding/error/func-expr-dflt.template
+/*---
+description: Object binding pattern with "nested" object binding pattern taking the `null` value (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.7 Runtime Semantics: KeyedBindingInitialization
+
+    [...]
+    3. If Initializer is present and v is undefined, then
+       [...]
+    4. Return the result of performing BindingInitialization for BindingPattern
+       passing v and environment as arguments.
+---*/
+
+var f = function({ w: { x, y, z } = { x: 4, y: 5, z: 6 } } = { w: null }) {};
+
+assert.throws(TypeError, function() {
+  f();
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-prop-obj-value-undef.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-prop-obj-value-undef.js
new file mode 100644
index 0000000000..52748be323
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-prop-obj-value-undef.js
@@ -0,0 +1,55 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/obj-ptrn-prop-obj-value-undef.case
+// - src/dstr-binding/error/func-expr-dflt.template
+/*---
+description: Object binding pattern with "nested" object binding pattern taking the `null` value (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.7 Runtime Semantics: KeyedBindingInitialization
+
+    [...]
+    3. If Initializer is present and v is undefined, then
+       [...]
+    4. Return the result of performing BindingInitialization for BindingPattern
+       passing v and environment as arguments.
+---*/
+
+var f = function({ w: { x, y, z } = undefined } = { }) {};
+
+assert.throws(TypeError, function() {
+  f();
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-prop-obj.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-prop-obj.js
new file mode 100644
index 0000000000..3f872708e1
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-prop-obj.js
@@ -0,0 +1,65 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/obj-ptrn-prop-obj.case
+// - src/dstr-binding/default/func-expr-dflt.template
+/*---
+description: Object binding pattern with "nested" object binding pattern not using initializer (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.7 Runtime Semantics: KeyedBindingInitialization
+
+    [...]
+    3. If Initializer is present and v is undefined, then
+       [...]
+    4. Return the result of performing BindingInitialization for BindingPattern
+       passing v and environment as arguments.
+---*/
+
+var callCount = 0;
+var f;
+f = function({ w: { x, y, z } = { x: 4, y: 5, z: 6 } } = { w: { x: undefined, z: 7 } }) {
+  assert.sameValue(x, undefined);
+  assert.sameValue(y, undefined);
+  assert.sameValue(z, 7);
+
+  assert.throws(ReferenceError, function() {
+    w;
+  });
+  callCount = callCount + 1;
+};
+
+f();
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-rest-getter.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-rest-getter.js
new file mode 100644
index 0000000000..7991ebe7fb
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-rest-getter.js
@@ -0,0 +1,60 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/obj-ptrn-rest-getter.case
+// - src/dstr-binding/default/func-expr-dflt.template
+/*---
+description: Getter is called when obj is being deconstructed to a rest Object (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [object-rest, destructuring-binding, default-parameters]
+flags: [generated]
+includes: [propertyHelper.js]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+---*/
+var count = 0;
+
+var callCount = 0;
+var f;
+f = function({...x} = { get v() { count++; return 2; } }) {
+  assert.sameValue(count, 1);
+
+  verifyProperty(x, "v", {
+    enumerable: true,
+    writable: true,
+    configurable: true,
+    value: 2
+  });
+  callCount = callCount + 1;
+};
+
+f();
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-rest-skip-non-enumerable.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-rest-skip-non-enumerable.js
new file mode 100644
index 0000000000..49a97715ae
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-rest-skip-non-enumerable.js
@@ -0,0 +1,68 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/obj-ptrn-rest-skip-non-enumerable.case
+// - src/dstr-binding/default/func-expr-dflt.template
+/*---
+description: Rest object doesn't contain non-enumerable properties (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [object-rest, destructuring-binding, default-parameters]
+flags: [generated]
+includes: [propertyHelper.js]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+---*/
+var o = {a: 3, b: 4};
+Object.defineProperty(o, "x", { value: 4, enumerable: false });
+
+var callCount = 0;
+var f;
+f = function({...rest} = o) {
+  assert.sameValue(rest.x, undefined);
+
+  verifyProperty(rest, "a", {
+    enumerable: true,
+    writable: true,
+    configurable: true,
+    value: 3
+  });
+
+  verifyProperty(rest, "b", {
+    enumerable: true,
+    writable: true,
+    configurable: true,
+    value: 4
+  });
+  callCount = callCount + 1;
+};
+
+f();
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-rest-val-obj.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-rest-val-obj.js
new file mode 100644
index 0000000000..59fab7659d
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-obj-ptrn-rest-val-obj.js
@@ -0,0 +1,67 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/obj-ptrn-rest-val-obj.case
+// - src/dstr-binding/default/func-expr-dflt.template
+/*---
+description: Rest object contains just unextracted data (function expression (default parameter))
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [object-rest, destructuring-binding, default-parameters]
+flags: [generated]
+includes: [propertyHelper.js]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+---*/
+
+var callCount = 0;
+var f;
+f = function({a, b, ...rest} = {x: 1, y: 2, a: 5, b: 3}) {
+  assert.sameValue(rest.a, undefined);
+  assert.sameValue(rest.b, undefined);
+
+  verifyProperty(rest, "x", {
+    enumerable: true,
+    writable: true,
+    configurable: true,
+    value: 1
+  });
+
+  verifyProperty(rest, "y", {
+    enumerable: true,
+    writable: true,
+    configurable: true,
+    value: 2
+  });
+  callCount = callCount + 1;
+};
+
+f();
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/obj-init-null.js b/js/src/tests/test262/language/expressions/function/dstr/obj-init-null.js
new file mode 100644
index 0000000000..22a89be415
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/obj-init-null.js
@@ -0,0 +1,53 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/obj-init-null.case
+// - src/dstr-binding/error/func-expr.template
+/*---
+description: Value specifed for object binding pattern must be object coercible (null) (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    Runtime Semantics: BindingInitialization
+
+    ObjectBindingPattern : { }
+
+    1. Return NormalCompletion(empty).
+---*/
+
+var f = function({}) {};
+
+assert.throws(TypeError, function() {
+  f(null);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/obj-init-undefined.js b/js/src/tests/test262/language/expressions/function/dstr/obj-init-undefined.js
new file mode 100644
index 0000000000..e33f15a702
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/obj-init-undefined.js
@@ -0,0 +1,53 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/obj-init-undefined.case
+// - src/dstr-binding/error/func-expr.template
+/*---
+description: Value specifed for object binding pattern must be object coercible (undefined) (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    Runtime Semantics: BindingInitialization
+
+    ObjectBindingPattern : { }
+
+    1. Return NormalCompletion(empty).
+---*/
+
+var f = function({}) {};
+
+assert.throws(TypeError, function() {
+  f(undefined);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-empty.js b/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-empty.js
new file mode 100644
index 0000000000..670c514037
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-empty.js
@@ -0,0 +1,63 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/obj-ptrn-empty.case
+// - src/dstr-binding/default/func-expr.template
+/*---
+description: No property access occurs for an "empty" object binding pattern (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    Runtime Semantics: BindingInitialization
+
+    ObjectBindingPattern : { }
+
+    1. Return NormalCompletion(empty).
+---*/
+var accessCount = 0;
+var obj = Object.defineProperty({}, 'attr', {
+  get: function() {
+    accessCount += 1;
+  }
+});
+
+var callCount = 0;
+var f;
+f = function({}) {
+  assert.sameValue(accessCount, 0);
+  callCount = callCount + 1;
+};
+
+f(obj);
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-id-get-value-err.js b/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-id-get-value-err.js
new file mode 100644
index 0000000000..9ba7becf45
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-id-get-value-err.js
@@ -0,0 +1,60 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/obj-ptrn-id-get-value-err.case
+// - src/dstr-binding/error/func-expr.template
+/*---
+description: Error thrown when accessing the corresponding property of the value object (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.7 Runtime Semantics: KeyedBindingInitialization
+
+    SingleNameBinding : BindingIdentifier Initializeropt
+
+    [...]
+    4. Let v be GetV(value, propertyName).
+    5. ReturnIfAbrupt(v).
+---*/
+var poisonedProperty = Object.defineProperty({}, 'poisoned', {
+  get: function() {
+    throw new Test262Error();
+  }
+});
+
+var f = function({ poisoned }) {};
+
+assert.throws(Test262Error, function() {
+  f(poisonedProperty);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-id-init-fn-name-arrow.js b/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-id-init-fn-name-arrow.js
new file mode 100644
index 0000000000..45bfd250f2
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-id-init-fn-name-arrow.js
@@ -0,0 +1,64 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/obj-ptrn-id-init-fn-name-arrow.case
+// - src/dstr-binding/default/func-expr.template
+/*---
+description: SingleNameBinding assigns `name` to arrow functions (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.7 Runtime Semantics: KeyedBindingInitialization
+
+    SingleNameBinding : BindingIdentifier Initializeropt
+
+    [...]
+    6. If Initializer is present and v is undefined, then
+       [...]
+       d. If IsAnonymousFunctionDefinition(Initializer) is true, then
+          i. Let hasNameProperty be HasOwnProperty(v, "name").
+          ii. ReturnIfAbrupt(hasNameProperty).
+          iii. If hasNameProperty is false, perform SetFunctionName(v,
+               bindingId).
+---*/
+
+var callCount = 0;
+var f;
+f = function({ arrow = () => {} }) {
+  assert.sameValue(arrow.name, 'arrow');
+  callCount = callCount + 1;
+};
+
+f({});
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-id-init-fn-name-class.js b/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-id-init-fn-name-class.js
new file mode 100644
index 0000000000..8d624ebc9a
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-id-init-fn-name-class.js
@@ -0,0 +1,66 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/obj-ptrn-id-init-fn-name-class.case
+// - src/dstr-binding/default/func-expr.template
+/*---
+description: SingleNameBinding assigns `name` to "anonymous" classes (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.7 Runtime Semantics: KeyedBindingInitialization
+
+    SingleNameBinding : BindingIdentifier Initializeropt
+
+    [...]
+    6. If Initializer is present and v is undefined, then
+       [...]
+       d. If IsAnonymousFunctionDefinition(Initializer) is true, then
+          i. Let hasNameProperty be HasOwnProperty(v, "name").
+          ii. ReturnIfAbrupt(hasNameProperty).
+          iii. If hasNameProperty is false, perform SetFunctionName(v,
+               bindingId).
+---*/
+
+var callCount = 0;
+var f;
+f = function({ cls = class {}, xCls = class X {}, xCls2 = class { static name() {} } }) {
+  assert.sameValue(cls.name, 'cls');
+  assert.notSameValue(xCls.name, 'xCls');
+  assert.notSameValue(xCls2.name, 'xCls2');
+  callCount = callCount + 1;
+};
+
+f({});
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-id-init-fn-name-cover.js b/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-id-init-fn-name-cover.js
new file mode 100644
index 0000000000..77a4382458
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-id-init-fn-name-cover.js
@@ -0,0 +1,65 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/obj-ptrn-id-init-fn-name-cover.case
+// - src/dstr-binding/default/func-expr.template
+/*---
+description: SingleNameBinding assigns `name` to "anonymous" functions "through" cover grammar (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.7 Runtime Semantics: KeyedBindingInitialization
+
+    SingleNameBinding : BindingIdentifier Initializeropt
+
+    [...]
+    6. If Initializer is present and v is undefined, then
+       [...]
+       d. If IsAnonymousFunctionDefinition(Initializer) is true, then
+          i. Let hasNameProperty be HasOwnProperty(v, "name").
+          ii. ReturnIfAbrupt(hasNameProperty).
+          iii. If hasNameProperty is false, perform SetFunctionName(v,
+               bindingId).
+---*/
+
+var callCount = 0;
+var f;
+f = function({ cover = (function () {}), xCover = (0, function() {})  }) {
+  assert.sameValue(cover.name, 'cover');
+  assert.notSameValue(xCover.name, 'xCover');
+  callCount = callCount + 1;
+};
+
+f({});
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-id-init-fn-name-fn.js b/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-id-init-fn-name-fn.js
new file mode 100644
index 0000000000..e26c192533
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-id-init-fn-name-fn.js
@@ -0,0 +1,65 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/obj-ptrn-id-init-fn-name-fn.case
+// - src/dstr-binding/default/func-expr.template
+/*---
+description: SingleNameBinding assigns name to "anonymous" functions (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.7 Runtime Semantics: KeyedBindingInitialization
+
+    SingleNameBinding : BindingIdentifier Initializeropt
+
+    [...]
+    6. If Initializer is present and v is undefined, then
+       [...]
+       d. If IsAnonymousFunctionDefinition(Initializer) is true, then
+          i. Let hasNameProperty be HasOwnProperty(v, "name").
+          ii. ReturnIfAbrupt(hasNameProperty).
+          iii. If hasNameProperty is false, perform SetFunctionName(v,
+               bindingId).
+---*/
+
+var callCount = 0;
+var f;
+f = function({ fn = function () {}, xFn = function x() {} }) {
+  assert.sameValue(fn.name, 'fn');
+  assert.notSameValue(xFn.name, 'xFn');
+  callCount = callCount + 1;
+};
+
+f({});
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-id-init-fn-name-gen.js b/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-id-init-fn-name-gen.js
new file mode 100644
index 0000000000..e24a2c0684
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-id-init-fn-name-gen.js
@@ -0,0 +1,66 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/obj-ptrn-id-init-fn-name-gen.case
+// - src/dstr-binding/default/func-expr.template
+/*---
+description: SingleNameBinding assigns name to "anonymous" generator functions (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [generators, destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.7 Runtime Semantics: KeyedBindingInitialization
+
+    SingleNameBinding : BindingIdentifier Initializeropt
+
+    [...]
+    6. If Initializer is present and v is undefined, then
+       [...]
+       d. If IsAnonymousFunctionDefinition(Initializer) is true, then
+          i. Let hasNameProperty be HasOwnProperty(v, "name").
+          ii. ReturnIfAbrupt(hasNameProperty).
+          iii. If hasNameProperty is false, perform SetFunctionName(v,
+               bindingId).
+
+---*/
+
+var callCount = 0;
+var f;
+f = function({ gen = function* () {}, xGen = function* x() {} }) {
+  assert.sameValue(gen.name, 'gen');
+  assert.notSameValue(xGen.name, 'xGen');
+  callCount = callCount + 1;
+};
+
+f({});
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-id-init-skipped.js b/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-id-init-skipped.js
new file mode 100644
index 0000000000..624c628473
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-id-init-skipped.js
@@ -0,0 +1,68 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/obj-ptrn-id-init-skipped.case
+// - src/dstr-binding/default/func-expr.template
+/*---
+description: Destructuring initializer is not evaluated when value is not `undefined` (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.7 Runtime Semantics: KeyedBindingInitialization
+
+    SingleNameBinding : BindingIdentifier Initializeropt
+
+    [...]
+    6. If Initializer is present and v is undefined, then
+       [...]
+    [...]
+---*/
+var initCount = 0;
+function counter() {
+  initCount += 1;
+}
+
+var callCount = 0;
+var f;
+f = function({ w = counter(), x = counter(), y = counter(), z = counter() }) {
+  assert.sameValue(w, null);
+  assert.sameValue(x, 0);
+  assert.sameValue(y, false);
+  assert.sameValue(z, '');
+  assert.sameValue(initCount, 0);
+  callCount = callCount + 1;
+};
+
+f({ w: null, x: 0, y: false, z: '' });
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-id-init-throws.js b/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-id-init-throws.js
new file mode 100644
index 0000000000..d93fba3d71
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-id-init-throws.js
@@ -0,0 +1,60 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/obj-ptrn-id-init-throws.case
+// - src/dstr-binding/error/func-expr.template
+/*---
+description: Error thrown when evaluating the initializer (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.7 Runtime Semantics: KeyedBindingInitialization
+
+    SingleNameBinding : BindingIdentifier Initializeropt
+
+    [...]
+    6. If Initializer is present and v is undefined, then
+       a. Let  defaultValue be the result of evaluating Initializer.
+       b. Let v be GetValue(defaultValue).
+       c. ReturnIfAbrupt(v).
+---*/
+function thrower() {
+  throw new Test262Error();
+}
+
+var f = function({ x = thrower() }) {};
+
+assert.throws(Test262Error, function() {
+  f({});
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-id-init-unresolvable.js b/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-id-init-unresolvable.js
new file mode 100644
index 0000000000..3d0fd3ca7b
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-id-init-unresolvable.js
@@ -0,0 +1,64 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/obj-ptrn-id-init-unresolvable.case
+// - src/dstr-binding/error/func-expr.template
+/*---
+description: Destructuring initializer is an unresolvable reference (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.7 Runtime Semantics: KeyedBindingInitialization
+
+    SingleNameBinding : BindingIdentifier Initializeropt
+
+    [...]
+    6. If Initializer is present and v is undefined, then
+       a. Let defaultValue be the result of evaluating Initializer.
+       b. Let v be GetValue(defaultValue).
+       c. ReturnIfAbrupt(v).
+
+    6.2.3.1 GetValue (V)
+
+    1. ReturnIfAbrupt(V).
+    2. If Type(V) is not Reference, return V.
+    3. Let base be GetBase(V).
+    4. If IsUnresolvableReference(V), throw a ReferenceError exception.
+---*/
+
+var f = function({ x = unresolvableReference }) {};
+
+assert.throws(ReferenceError, function() {
+  f({});
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-id-trailing-comma.js b/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-id-trailing-comma.js
new file mode 100644
index 0000000000..1dda45cabb
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-id-trailing-comma.js
@@ -0,0 +1,58 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/obj-ptrn-id-trailing-comma.case
+// - src/dstr-binding/default/func-expr.template
+/*---
+description: Trailing comma is allowed following BindingPropertyList (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3 Destructuring Binding Patterns
+
+    ObjectBindingPattern[Yield] :
+        { }
+        { BindingPropertyList[?Yield] }
+        { BindingPropertyList[?Yield] , }
+---*/
+
+var callCount = 0;
+var f;
+f = function({ x, }) {
+  assert.sameValue(x, 23);
+  callCount = callCount + 1;
+};
+
+f({ x: 23 });
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-list-err.js b/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-list-err.js
new file mode 100644
index 0000000000..22862d4f3b
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-list-err.js
@@ -0,0 +1,61 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/obj-ptrn-list-err.case
+// - src/dstr-binding/error/func-expr.template
+/*---
+description: Binding property list evaluation is interrupted by an abrupt completion (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.5 Runtime Semantics: BindingInitialization
+
+    BindingPropertyList : BindingPropertyList , BindingProperty
+
+    1. Let status be the result of performing BindingInitialization for
+       BindingPropertyList using value and environment as arguments.
+    2. ReturnIfAbrupt(status).
+---*/
+var initCount = 0;
+function thrower() {
+  throw new Test262Error();
+}
+
+var f = function({ a, b = thrower(), c = ++initCount }) {};
+
+assert.throws(Test262Error, function() {
+  f({});
+});
+
+assert.sameValue(initCount, 0);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-prop-ary-init.js b/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-prop-ary-init.js
new file mode 100644
index 0000000000..00a22b17bc
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-prop-ary-init.js
@@ -0,0 +1,67 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/obj-ptrn-prop-ary-init.case
+// - src/dstr-binding/default/func-expr.template
+/*---
+description: Object binding pattern with "nested" array binding pattern using initializer (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.7 Runtime Semantics: KeyedBindingInitialization
+
+    [...]
+    3. If Initializer is present and v is undefined, then
+       a. Let defaultValue be the result of evaluating Initializer.
+       b. Let v be GetValue(defaultValue).
+       c. ReturnIfAbrupt(v).
+    4. Return the result of performing BindingInitialization for BindingPattern
+       passing v and environment as arguments.
+---*/
+
+var callCount = 0;
+var f;
+f = function({ w: [x, y, z] = [4, 5, 6] }) {
+  assert.sameValue(x, 4);
+  assert.sameValue(y, 5);
+  assert.sameValue(z, 6);
+
+  assert.throws(ReferenceError, function() {
+    w;
+  });
+  callCount = callCount + 1;
+};
+
+f({});
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-prop-ary-trailing-comma.js b/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-prop-ary-trailing-comma.js
new file mode 100644
index 0000000000..e1562352c6
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-prop-ary-trailing-comma.js
@@ -0,0 +1,58 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/obj-ptrn-prop-ary-trailing-comma.case
+// - src/dstr-binding/default/func-expr.template
+/*---
+description: Trailing comma is allowed following BindingPropertyList (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3 Destructuring Binding Patterns
+
+    ObjectBindingPattern[Yield] :
+        { }
+        { BindingPropertyList[?Yield] }
+        { BindingPropertyList[?Yield] , }
+---*/
+
+var callCount = 0;
+var f;
+f = function({ x: [y], }) {
+  assert.sameValue(y,45);
+  callCount = callCount + 1;
+};
+
+f({ x: [45] });
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-prop-ary-value-null.js b/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-prop-ary-value-null.js
new file mode 100644
index 0000000000..c99c84dc32
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-prop-ary-value-null.js
@@ -0,0 +1,55 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/obj-ptrn-prop-ary-value-null.case
+// - src/dstr-binding/error/func-expr.template
+/*---
+description: Object binding pattern with "nested" array binding pattern taking the `null` value (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.7 Runtime Semantics: KeyedBindingInitialization
+
+    [...]
+    3. If Initializer is present and v is undefined, then
+       [...]
+    4. Return the result of performing BindingInitialization for BindingPattern
+       passing v and environment as arguments.
+---*/
+
+var f = function({ w: [x, y, z] = [4, 5, 6] }) {};
+
+assert.throws(TypeError, function() {
+  f({ w: null });
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-prop-ary.js b/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-prop-ary.js
new file mode 100644
index 0000000000..d5f5feab97
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-prop-ary.js
@@ -0,0 +1,65 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/obj-ptrn-prop-ary.case
+// - src/dstr-binding/default/func-expr.template
+/*---
+description: Object binding pattern with "nested" array binding pattern not using initializer (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.7 Runtime Semantics: KeyedBindingInitialization
+
+    [...]
+    3. If Initializer is present and v is undefined, then
+       [...]
+    4. Return the result of performing BindingInitialization for BindingPattern
+       passing v and environment as arguments.
+---*/
+
+var callCount = 0;
+var f;
+f = function({ w: [x, y, z] = [4, 5, 6] }) {
+  assert.sameValue(x, 7);
+  assert.sameValue(y, undefined);
+  assert.sameValue(z, undefined);
+
+  assert.throws(ReferenceError, function() {
+    w;
+  });
+  callCount = callCount + 1;
+};
+
+f({ w: [7, undefined, ] });
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-prop-eval-err.js b/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-prop-eval-err.js
new file mode 100644
index 0000000000..876cde65a3
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-prop-eval-err.js
@@ -0,0 +1,57 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/obj-ptrn-prop-eval-err.case
+// - src/dstr-binding/error/func-expr.template
+/*---
+description: Evaluation of property name returns an abrupt completion (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.5 Runtime Semantics: BindingInitialization
+
+    BindingProperty : PropertyName : BindingElement
+
+    1. Let P be the result of evaluating PropertyName
+    2. ReturnIfAbrupt(P).
+---*/
+function thrower() {
+  throw new Test262Error();
+}
+
+var f = function({ [thrower()]: x }) {};
+
+assert.throws(Test262Error, function() {
+  f({});
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-prop-id-get-value-err.js b/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-prop-id-get-value-err.js
new file mode 100644
index 0000000000..2f403ac7f5
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-prop-id-get-value-err.js
@@ -0,0 +1,62 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/obj-ptrn-prop-id-get-value-err.case
+// - src/dstr-binding/error/func-expr.template
+/*---
+description: Error thrown when accessing the corresponding property of the value object (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.7 Runtime Semantics: KeyedBindingInitialization
+
+    BindingElement : BindingPattern Initializeropt
+
+    1. Let v be GetV(value, propertyName).
+    2. ReturnIfAbrupt(v).
+---*/
+var initEvalCount = 0;
+var poisonedProperty = Object.defineProperty({}, 'poisoned', {
+  get: function() {
+    throw new Test262Error();
+  }
+});
+
+var f = function({ poisoned: x = ++initEvalCount }) {};
+
+assert.throws(Test262Error, function() {
+  f(poisonedProperty);
+});
+
+assert.sameValue(initEvalCount, 0);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-prop-id-init-skipped.js b/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-prop-id-init-skipped.js
new file mode 100644
index 0000000000..b5f3c99e70
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-prop-id-init-skipped.js
@@ -0,0 +1,80 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/obj-ptrn-prop-id-init-skipped.case
+// - src/dstr-binding/default/func-expr.template
+/*---
+description: Destructuring initializer is not evaluated when value is not `undefined` (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.7 Runtime Semantics: KeyedBindingInitialization
+
+    BindingElement : BindingPattern Initializeropt
+
+    [...]
+    3. If Initializer is present and v is undefined, then
+    [...]
+---*/
+var initCount = 0;
+function counter() {
+  initCount += 1;
+}
+
+var callCount = 0;
+var f;
+f = function({ s: t = counter(), u: v = counter(), w: x = counter(), y: z = counter() }) {
+  assert.sameValue(t, null);
+  assert.sameValue(v, 0);
+  assert.sameValue(x, false);
+  assert.sameValue(z, '');
+  assert.sameValue(initCount, 0);
+
+  assert.throws(ReferenceError, function() {
+    s;
+  });
+  assert.throws(ReferenceError, function() {
+    u;
+  });
+  assert.throws(ReferenceError, function() {
+    w;
+  });
+  assert.throws(ReferenceError, function() {
+    y;
+  });
+  callCount = callCount + 1;
+};
+
+f({ s: null, u: 0, w: false, y: '' });
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-prop-id-init-throws.js b/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-prop-id-init-throws.js
new file mode 100644
index 0000000000..e3e3745f54
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-prop-id-init-throws.js
@@ -0,0 +1,60 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/obj-ptrn-prop-id-init-throws.case
+// - src/dstr-binding/error/func-expr.template
+/*---
+description: Error thrown when evaluating the initializer (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.7 Runtime Semantics: KeyedBindingInitialization
+
+    BindingElement : BindingPattern Initializeropt
+
+    [...]
+    3. If Initializer is present and v is undefined, then
+       a. Let defaultValue be the result of evaluating Initializer.
+       b. Let v be GetValue(defaultValue).
+       c. ReturnIfAbrupt(v).
+---*/
+function thrower() {
+  throw new Test262Error();
+}
+
+var f = function({ x: y = thrower() }) {};
+
+assert.throws(Test262Error, function() {
+  f({});
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-prop-id-init-unresolvable.js b/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-prop-id-init-unresolvable.js
new file mode 100644
index 0000000000..f8db30d45e
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-prop-id-init-unresolvable.js
@@ -0,0 +1,64 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/obj-ptrn-prop-id-init-unresolvable.case
+// - src/dstr-binding/error/func-expr.template
+/*---
+description: Destructuring initializer is an unresolvable reference (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.7 Runtime Semantics: KeyedBindingInitialization
+
+    BindingElement : BindingPattern Initializeropt
+
+    [...]
+    3. If Initializer is present and v is undefined, then
+       a. Let defaultValue be the result of evaluating Initializer.
+       b. Let v be GetValue(defaultValue).
+       c. ReturnIfAbrupt(v).
+
+    6.2.3.1 GetValue (V)
+
+    1. ReturnIfAbrupt(V).
+    2. If Type(V) is not Reference, return V.
+    3. Let base be GetBase(V).
+    4. If IsUnresolvableReference(V), throw a ReferenceError exception.
+---*/
+
+var f = function({ x: y = unresolvableReference }) {};
+
+assert.throws(ReferenceError, function() {
+  f({});
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-prop-id-init.js b/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-prop-id-init.js
new file mode 100644
index 0000000000..bcb826d0ab
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-prop-id-init.js
@@ -0,0 +1,61 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/obj-ptrn-prop-id-init.case
+// - src/dstr-binding/default/func-expr.template
+/*---
+description: Binding as specified via property name, identifier, and initializer (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.7 Runtime Semantics: KeyedBindingInitialization
+
+    SingleNameBinding : BindingIdentifier Initializeropt
+
+    [...]
+    8. Return InitializeReferencedBinding(lhs, v).
+---*/
+
+var callCount = 0;
+var f;
+f = function({ x: y = 33 }) {
+  assert.sameValue(y, 33);
+  assert.throws(ReferenceError, function() {
+    x;
+  });
+  callCount = callCount + 1;
+};
+
+f({ });
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-prop-id-trailing-comma.js b/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-prop-id-trailing-comma.js
new file mode 100644
index 0000000000..17207afe6b
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-prop-id-trailing-comma.js
@@ -0,0 +1,62 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/obj-ptrn-prop-id-trailing-comma.case
+// - src/dstr-binding/default/func-expr.template
+/*---
+description: Trailing comma is allowed following BindingPropertyList (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3 Destructuring Binding Patterns
+
+    ObjectBindingPattern[Yield] :
+        { }
+        { BindingPropertyList[?Yield] }
+        { BindingPropertyList[?Yield] , }
+---*/
+
+var callCount = 0;
+var f;
+f = function({ x: y, }) {
+  assert.sameValue(y, 23);
+
+  assert.throws(ReferenceError, function() {
+    x;
+  });
+  callCount = callCount + 1;
+};
+
+f({ x: 23 });
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-prop-id.js b/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-prop-id.js
new file mode 100644
index 0000000000..9b75e6791b
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-prop-id.js
@@ -0,0 +1,61 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/obj-ptrn-prop-id.case
+// - src/dstr-binding/default/func-expr.template
+/*---
+description: Binding as specified via property name and identifier (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.7 Runtime Semantics: KeyedBindingInitialization
+
+    SingleNameBinding : BindingIdentifier Initializeropt
+
+    [...]
+    8. Return InitializeReferencedBinding(lhs, v).
+---*/
+
+var callCount = 0;
+var f;
+f = function({ x: y }) {
+  assert.sameValue(y, 23);
+  assert.throws(ReferenceError, function() {
+    x;
+  });
+  callCount = callCount + 1;
+};
+
+f({ x: 23 });
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-prop-obj-init.js b/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-prop-obj-init.js
new file mode 100644
index 0000000000..0106390cd8
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-prop-obj-init.js
@@ -0,0 +1,67 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/obj-ptrn-prop-obj-init.case
+// - src/dstr-binding/default/func-expr.template
+/*---
+description: Object binding pattern with "nested" object binding pattern using initializer (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.7 Runtime Semantics: KeyedBindingInitialization
+
+    [...]
+    3. If Initializer is present and v is undefined, then
+       a. Let defaultValue be the result of evaluating Initializer.
+       b. Let v be GetValue(defaultValue).
+       c. ReturnIfAbrupt(v).
+    4. Return the result of performing BindingInitialization for BindingPattern
+       passing v and environment as arguments.
+---*/
+
+var callCount = 0;
+var f;
+f = function({ w: { x, y, z } = { x: 4, y: 5, z: 6 } }) {
+  assert.sameValue(x, 4);
+  assert.sameValue(y, 5);
+  assert.sameValue(z, 6);
+
+  assert.throws(ReferenceError, function() {
+    w;
+  });
+  callCount = callCount + 1;
+};
+
+f({ w: undefined });
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-prop-obj-value-null.js b/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-prop-obj-value-null.js
new file mode 100644
index 0000000000..08942b8e9b
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-prop-obj-value-null.js
@@ -0,0 +1,55 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/obj-ptrn-prop-obj-value-null.case
+// - src/dstr-binding/error/func-expr.template
+/*---
+description: Object binding pattern with "nested" object binding pattern taking the `null` value (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.7 Runtime Semantics: KeyedBindingInitialization
+
+    [...]
+    3. If Initializer is present and v is undefined, then
+       [...]
+    4. Return the result of performing BindingInitialization for BindingPattern
+       passing v and environment as arguments.
+---*/
+
+var f = function({ w: { x, y, z } = { x: 4, y: 5, z: 6 } }) {};
+
+assert.throws(TypeError, function() {
+  f({ w: null });
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-prop-obj-value-undef.js b/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-prop-obj-value-undef.js
new file mode 100644
index 0000000000..9b11a750cc
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-prop-obj-value-undef.js
@@ -0,0 +1,55 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/obj-ptrn-prop-obj-value-undef.case
+// - src/dstr-binding/error/func-expr.template
+/*---
+description: Object binding pattern with "nested" object binding pattern taking the `null` value (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.7 Runtime Semantics: KeyedBindingInitialization
+
+    [...]
+    3. If Initializer is present and v is undefined, then
+       [...]
+    4. Return the result of performing BindingInitialization for BindingPattern
+       passing v and environment as arguments.
+---*/
+
+var f = function({ w: { x, y, z } = undefined }) {};
+
+assert.throws(TypeError, function() {
+  f({ });
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-prop-obj.js b/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-prop-obj.js
new file mode 100644
index 0000000000..57e8dcd72e
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-prop-obj.js
@@ -0,0 +1,65 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/obj-ptrn-prop-obj.case
+// - src/dstr-binding/default/func-expr.template
+/*---
+description: Object binding pattern with "nested" object binding pattern not using initializer (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [destructuring-binding]
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.7 Runtime Semantics: KeyedBindingInitialization
+
+    [...]
+    3. If Initializer is present and v is undefined, then
+       [...]
+    4. Return the result of performing BindingInitialization for BindingPattern
+       passing v and environment as arguments.
+---*/
+
+var callCount = 0;
+var f;
+f = function({ w: { x, y, z } = { x: 4, y: 5, z: 6 } }) {
+  assert.sameValue(x, undefined);
+  assert.sameValue(y, undefined);
+  assert.sameValue(z, 7);
+
+  assert.throws(ReferenceError, function() {
+    w;
+  });
+  callCount = callCount + 1;
+};
+
+f({ w: { x: undefined, z: 7 } });
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-rest-getter.js b/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-rest-getter.js
new file mode 100644
index 0000000000..4742f63daf
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-rest-getter.js
@@ -0,0 +1,60 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/obj-ptrn-rest-getter.case
+// - src/dstr-binding/default/func-expr.template
+/*---
+description: Getter is called when obj is being deconstructed to a rest Object (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [object-rest, destructuring-binding]
+flags: [generated]
+includes: [propertyHelper.js]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+---*/
+var count = 0;
+
+var callCount = 0;
+var f;
+f = function({...x}) {
+  assert.sameValue(count, 1);
+
+  verifyProperty(x, "v", {
+    enumerable: true,
+    writable: true,
+    configurable: true,
+    value: 2
+  });
+  callCount = callCount + 1;
+};
+
+f({ get v() { count++; return 2; } });
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-rest-skip-non-enumerable.js b/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-rest-skip-non-enumerable.js
new file mode 100644
index 0000000000..a947afad0a
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-rest-skip-non-enumerable.js
@@ -0,0 +1,68 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/obj-ptrn-rest-skip-non-enumerable.case
+// - src/dstr-binding/default/func-expr.template
+/*---
+description: Rest object doesn't contain non-enumerable properties (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [object-rest, destructuring-binding]
+flags: [generated]
+includes: [propertyHelper.js]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+---*/
+var o = {a: 3, b: 4};
+Object.defineProperty(o, "x", { value: 4, enumerable: false });
+
+var callCount = 0;
+var f;
+f = function({...rest}) {
+  assert.sameValue(rest.x, undefined);
+
+  verifyProperty(rest, "a", {
+    enumerable: true,
+    writable: true,
+    configurable: true,
+    value: 3
+  });
+
+  verifyProperty(rest, "b", {
+    enumerable: true,
+    writable: true,
+    configurable: true,
+    value: 4
+  });
+  callCount = callCount + 1;
+};
+
+f(o);
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-rest-val-obj.js b/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-rest-val-obj.js
new file mode 100644
index 0000000000..418291f83a
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/obj-ptrn-rest-val-obj.js
@@ -0,0 +1,67 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/obj-ptrn-rest-val-obj.case
+// - src/dstr-binding/default/func-expr.template
+/*---
+description: Rest object contains just unextracted data (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [object-rest, destructuring-binding]
+flags: [generated]
+includes: [propertyHelper.js]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+---*/
+
+var callCount = 0;
+var f;
+f = function({a, b, ...rest}) {
+  assert.sameValue(rest.a, undefined);
+  assert.sameValue(rest.b, undefined);
+
+  verifyProperty(rest, "x", {
+    enumerable: true,
+    writable: true,
+    configurable: true,
+    value: 1
+  });
+
+  verifyProperty(rest, "y", {
+    enumerable: true,
+    writable: true,
+    configurable: true,
+    value: 2
+  });
+  callCount = callCount + 1;
+};
+
+f({x: 1, y: 2, a: 5, b: 3});
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/dstr/shell.js b/js/src/tests/test262/language/expressions/function/dstr/shell.js
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/dstr/shell.js
diff --git a/js/src/tests/test262/language/expressions/function/early-body-super-call.js b/js/src/tests/test262/language/expressions/function/early-body-super-call.js
new file mode 100644
index 0000000000..84013a0642
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/early-body-super-call.js
@@ -0,0 +1,19 @@
+// |reftest| error:SyntaxError
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-function-definitions-static-semantics-early-errors
+es6id: 14.1.2
+description: Body may not contain a "super" call
+info: |
+  It is a Syntax Error if FunctionBody Contains SuperCall is true.
+negative:
+  phase: parse
+  type: SyntaxError
+---*/
+
+$DONOTEVALUATE();
+
+0, function() {
+  super();
+};
diff --git a/js/src/tests/test262/language/expressions/function/early-body-super-prop.js b/js/src/tests/test262/language/expressions/function/early-body-super-prop.js
new file mode 100644
index 0000000000..8a1afa1bd5
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/early-body-super-prop.js
@@ -0,0 +1,19 @@
+// |reftest| error:SyntaxError
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-function-definitions-static-semantics-early-errors
+es6id: 14.1.2
+description: Body may not contain a "super" property reference
+info: |
+  It is a Syntax Error if FunctionBody Contains SuperProperty is true.
+negative:
+  phase: parse
+  type: SyntaxError
+---*/
+
+$DONOTEVALUATE();
+
+0, function() {
+  super.x;
+};
diff --git a/js/src/tests/test262/language/expressions/function/early-errors/browser.js b/js/src/tests/test262/language/expressions/function/early-errors/browser.js
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/early-errors/browser.js
diff --git a/js/src/tests/test262/language/expressions/function/early-errors/invalid-names-call-expression-bad-reference.js b/js/src/tests/test262/language/expressions/function/early-errors/invalid-names-call-expression-bad-reference.js
new file mode 100644
index 0000000000..7f7319cb43
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/early-errors/invalid-names-call-expression-bad-reference.js
@@ -0,0 +1,41 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/invalid-private-names/call-expression-bad-reference.case
+// - src/invalid-private-names/default/function-expr.template
+/*---
+description: bad reference in call expression (Invalid private names should throw a SyntaxError, inside function expression)
+esid: sec-static-semantics-early-errors
+features: [class-fields-private]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    ScriptBody:StatementList
+      It is a Syntax Error if AllPrivateNamesValid of StatementList with an empty List
+      as an argument is false unless the source code is eval code that is being
+      processed by a direct eval.
+
+    ModuleBody:ModuleItemList
+      It is a Syntax Error if AllPrivateNamesValid of ModuleItemList with an empty List
+      as an argument is false.
+
+
+    Static Semantics: AllPrivateNamesValid
+
+    MemberExpression : MemberExpression . PrivateName
+
+    1. If StringValue of PrivateName is in names, return true.
+    2. Return false.
+
+    CallExpression : CallExpression . PrivateName
+
+    1. If StringValue of PrivateName is in names, return true.
+    2. Return false.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var fn = function() { (() => {})().#x };
diff --git a/js/src/tests/test262/language/expressions/function/early-errors/invalid-names-call-expression-this.js b/js/src/tests/test262/language/expressions/function/early-errors/invalid-names-call-expression-this.js
new file mode 100644
index 0000000000..5925936d5a
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/early-errors/invalid-names-call-expression-this.js
@@ -0,0 +1,41 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/invalid-private-names/call-expression-this.case
+// - src/invalid-private-names/default/function-expr.template
+/*---
+description: this evaluated in call expression (Invalid private names should throw a SyntaxError, inside function expression)
+esid: sec-static-semantics-early-errors
+features: [class-fields-private]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    ScriptBody:StatementList
+      It is a Syntax Error if AllPrivateNamesValid of StatementList with an empty List
+      as an argument is false unless the source code is eval code that is being
+      processed by a direct eval.
+
+    ModuleBody:ModuleItemList
+      It is a Syntax Error if AllPrivateNamesValid of ModuleItemList with an empty List
+      as an argument is false.
+
+
+    Static Semantics: AllPrivateNamesValid
+
+    MemberExpression : MemberExpression . PrivateName
+
+    1. If StringValue of PrivateName is in names, return true.
+    2. Return false.
+
+    CallExpression : CallExpression . PrivateName
+
+    1. If StringValue of PrivateName is in names, return true.
+    2. Return false.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var fn = function() { (() => this)().#x };
diff --git a/js/src/tests/test262/language/expressions/function/early-errors/invalid-names-member-expression-bad-reference.js b/js/src/tests/test262/language/expressions/function/early-errors/invalid-names-member-expression-bad-reference.js
new file mode 100644
index 0000000000..6cdb1ade20
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/early-errors/invalid-names-member-expression-bad-reference.js
@@ -0,0 +1,41 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/invalid-private-names/member-expression-bad-reference.case
+// - src/invalid-private-names/default/function-expr.template
+/*---
+description: bad reference in member expression (Invalid private names should throw a SyntaxError, inside function expression)
+esid: sec-static-semantics-early-errors
+features: [class-fields-private]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    ScriptBody:StatementList
+      It is a Syntax Error if AllPrivateNamesValid of StatementList with an empty List
+      as an argument is false unless the source code is eval code that is being
+      processed by a direct eval.
+
+    ModuleBody:ModuleItemList
+      It is a Syntax Error if AllPrivateNamesValid of ModuleItemList with an empty List
+      as an argument is false.
+
+
+    Static Semantics: AllPrivateNamesValid
+
+    MemberExpression : MemberExpression . PrivateName
+
+    1. If StringValue of PrivateName is in names, return true.
+    2. Return false.
+
+    CallExpression : CallExpression . PrivateName
+
+    1. If StringValue of PrivateName is in names, return true.
+    2. Return false.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var fn = function() { something.#x };
diff --git a/js/src/tests/test262/language/expressions/function/early-errors/invalid-names-member-expression-this.js b/js/src/tests/test262/language/expressions/function/early-errors/invalid-names-member-expression-this.js
new file mode 100644
index 0000000000..50508c02b1
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/early-errors/invalid-names-member-expression-this.js
@@ -0,0 +1,41 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/invalid-private-names/member-expression-this.case
+// - src/invalid-private-names/default/function-expr.template
+/*---
+description: this reference in member expression (Invalid private names should throw a SyntaxError, inside function expression)
+esid: sec-static-semantics-early-errors
+features: [class-fields-private]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    ScriptBody:StatementList
+      It is a Syntax Error if AllPrivateNamesValid of StatementList with an empty List
+      as an argument is false unless the source code is eval code that is being
+      processed by a direct eval.
+
+    ModuleBody:ModuleItemList
+      It is a Syntax Error if AllPrivateNamesValid of ModuleItemList with an empty List
+      as an argument is false.
+
+
+    Static Semantics: AllPrivateNamesValid
+
+    MemberExpression : MemberExpression . PrivateName
+
+    1. If StringValue of PrivateName is in names, return true.
+    2. Return false.
+
+    CallExpression : CallExpression . PrivateName
+
+    1. If StringValue of PrivateName is in names, return true.
+    2. Return false.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var fn = function() { this.#x };
diff --git a/js/src/tests/test262/language/expressions/function/early-errors/shell.js b/js/src/tests/test262/language/expressions/function/early-errors/shell.js
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/early-errors/shell.js
diff --git a/js/src/tests/test262/language/expressions/function/early-params-super-call.js b/js/src/tests/test262/language/expressions/function/early-params-super-call.js
new file mode 100644
index 0000000000..71c684f8dd
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/early-params-super-call.js
@@ -0,0 +1,17 @@
+// |reftest| error:SyntaxError
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-function-definitions-static-semantics-early-errors
+es6id: 14.1.2
+description: Parameters may not contain a "super" call
+info: |
+  It is a Syntax Error if FormalParameters Contains SuperProperty is true.
+negative:
+  phase: parse
+  type: SyntaxError
+---*/
+
+$DONOTEVALUATE();
+
+0, function(x = super()) {};
diff --git a/js/src/tests/test262/language/expressions/function/early-params-super-prop.js b/js/src/tests/test262/language/expressions/function/early-params-super-prop.js
new file mode 100644
index 0000000000..9a9c76cf9c
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/early-params-super-prop.js
@@ -0,0 +1,17 @@
+// |reftest| error:SyntaxError
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-function-definitions-static-semantics-early-errors
+es6id: 14.1.2
+description: Parameters may not contain a "super" property reference
+info: |
+  It is a Syntax Error if FunctionBody Contains SuperProperty is true.
+negative:
+  phase: parse
+  type: SyntaxError
+---*/
+
+$DONOTEVALUATE();
+
+0, function(x = super.x) {};
diff --git a/js/src/tests/test262/language/expressions/function/eval-var-scope-syntax-err.js b/js/src/tests/test262/language/expressions/function/eval-var-scope-syntax-err.js
new file mode 100644
index 0000000000..5ad4902157
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/eval-var-scope-syntax-err.js
@@ -0,0 +1,60 @@
+// This file was procedurally generated from the following sources:
+// - src/function-forms/eval-var-scope-syntax-err.case
+// - src/function-forms/error-no-strict/func-expr.template
+/*---
+description: sloppy direct eval in params introduces var (function expression in sloppy code)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [default-parameters]
+flags: [generated, noStrict]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    
+    Runtime Semantics: IteratorBindingInitialization
+    FormalParameter : BindingElement
+
+    1. Return the result of performing IteratorBindingInitialization for BindingElement with arguments iteratorRecord and environment.
+
+---*/
+
+var callCount = 0;
+var f;
+f = function(a = eval("var a = 42")) {
+  
+  callCount = callCount + 1;
+};
+
+assert.throws(SyntaxError, function() {
+  f();
+});
+assert.sameValue(callCount, 0, 'function body not evaluated');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/forbidden-ext/b1/browser.js b/js/src/tests/test262/language/expressions/function/forbidden-ext/b1/browser.js
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/forbidden-ext/b1/browser.js
diff --git a/js/src/tests/test262/language/expressions/function/forbidden-ext/b1/func-expr-strict-forbidden-ext-direct-access-prop-arguments.js b/js/src/tests/test262/language/expressions/function/forbidden-ext/b1/func-expr-strict-forbidden-ext-direct-access-prop-arguments.js
new file mode 100644
index 0000000000..e08d963d7b
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/forbidden-ext/b1/func-expr-strict-forbidden-ext-direct-access-prop-arguments.js
@@ -0,0 +1,35 @@
+// This file was procedurally generated from the following sources:
+// - src/function-forms/forbidden-ext-direct-access-prop-arguments.case
+// - src/function-forms/forbidden-extensions/bullet-one/func-expr-strict.template
+/*---
+description: Forbidden extension, f.arguments (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+flags: [generated, noStrict]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+    ECMAScript function objects defined using syntactic constructors in strict mode code must
+    not be created with own properties named "caller" or "arguments". Such own properties also
+    must not be created for function objects defined using an ArrowFunction, MethodDefinition,
+    GeneratorDeclaration, GeneratorExpression, AsyncGeneratorDeclaration, AsyncGeneratorExpression,
+    ClassDeclaration, ClassExpression, AsyncFunctionDeclaration, AsyncFunctionExpression, or
+    AsyncArrowFunction regardless of whether the definition is contained in strict mode code.
+    Built-in functions, strict functions created using the Function constructor, generator functions
+    created using the Generator constructor, async functions created using the AsyncFunction
+    constructor, and functions created using the bind method also must not be created with such own
+    properties.
+
+---*/
+
+var callCount = 0;
+var f;
+f = function() {
+  "use strict";
+  assert.sameValue(f.hasOwnProperty("arguments"), false);
+  callCount++;
+};
+
+f();
+assert.sameValue(callCount, 1, 'function body evaluated');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/forbidden-ext/b1/func-expr-strict-forbidden-ext-direct-access-prop-caller.js b/js/src/tests/test262/language/expressions/function/forbidden-ext/b1/func-expr-strict-forbidden-ext-direct-access-prop-caller.js
new file mode 100644
index 0000000000..b5c0b21c67
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/forbidden-ext/b1/func-expr-strict-forbidden-ext-direct-access-prop-caller.js
@@ -0,0 +1,35 @@
+// This file was procedurally generated from the following sources:
+// - src/function-forms/forbidden-ext-direct-access-prop-caller.case
+// - src/function-forms/forbidden-extensions/bullet-one/func-expr-strict.template
+/*---
+description: Forbidden extension, o.caller (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+flags: [generated, noStrict]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+    ECMAScript function objects defined using syntactic constructors in strict mode code must
+    not be created with own properties named "caller" or "arguments". Such own properties also
+    must not be created for function objects defined using an ArrowFunction, MethodDefinition,
+    GeneratorDeclaration, GeneratorExpression, AsyncGeneratorDeclaration, AsyncGeneratorExpression,
+    ClassDeclaration, ClassExpression, AsyncFunctionDeclaration, AsyncFunctionExpression, or
+    AsyncArrowFunction regardless of whether the definition is contained in strict mode code.
+    Built-in functions, strict functions created using the Function constructor, generator functions
+    created using the Generator constructor, async functions created using the AsyncFunction
+    constructor, and functions created using the bind method also must not be created with such own
+    properties.
+
+---*/
+
+var callCount = 0;
+var f;
+f = function() {
+  "use strict";
+  assert.sameValue(f.hasOwnProperty("caller"), false);
+  callCount++;
+};
+
+f();
+assert.sameValue(callCount, 1, 'function body evaluated');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/forbidden-ext/b1/shell.js b/js/src/tests/test262/language/expressions/function/forbidden-ext/b1/shell.js
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/forbidden-ext/b1/shell.js
diff --git a/js/src/tests/test262/language/expressions/function/forbidden-ext/b2/browser.js b/js/src/tests/test262/language/expressions/function/forbidden-ext/b2/browser.js
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/forbidden-ext/b2/browser.js
diff --git a/js/src/tests/test262/language/expressions/function/forbidden-ext/b2/func-expr-forbidden-ext-indirect-access-own-prop-caller-get.js b/js/src/tests/test262/language/expressions/function/forbidden-ext/b2/func-expr-forbidden-ext-indirect-access-own-prop-caller-get.js
new file mode 100644
index 0000000000..2d1350aee7
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/forbidden-ext/b2/func-expr-forbidden-ext-indirect-access-own-prop-caller-get.js
@@ -0,0 +1,61 @@
+// This file was procedurally generated from the following sources:
+// - src/function-forms/forbidden-ext-indirect-access-own-prop-caller-get.case
+// - src/function-forms/forbidden-extensions/bullet-two/func-expr.template
+/*---
+description: Forbidden extension, o.caller (function expression)
+esid: sec-definitions-runtime-semantics-evaluation
+flags: [generated, noStrict]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+    If an implementation extends any function object with an own property named "caller" the value of
+    that property, as observed using [[Get]] or [[GetOwnProperty]], must not be a strict function
+    object. If it is an accessor property, the function that is the value of the property's [[Get]]
+    attribute must never return a strict function when called.
+
+---*/
+var CALLER_OWN_PROPERTY_DOES_NOT_EXIST = Symbol();
+function inner() {
+  // This property may exist, but is forbidden from having a value that is a strict function object
+  return inner.hasOwnProperty("caller")
+    ? inner.caller
+    : CALLER_OWN_PROPERTY_DOES_NOT_EXIST;
+}
+
+var callCount = 0;
+var f;
+f = function() {
+  "use strict";
+  // This and the following conditional value is set in the test's .case file.
+  // For every test that has a "true" value here, there is a
+  // corresponding test that has a "false" value here.
+  // They are generated from two different case files, which use
+  // the same templates.
+  let descriptor = Object.getOwnPropertyDescriptor(inner, "caller");
+  if (descriptor && descriptor.configurable && true) {
+    Object.defineProperty(inner, "caller", {get(){return 1}});
+  }
+  var result = inner();
+  if (descriptor && descriptor.configurable && true) {
+    assert.sameValue(result, 1, 'If this test defined an own "caller" property on the inner function, then it should be accessible and should return the value it was set to.');
+  }
+
+  // "CALLER_OWN_PROPERTY_DOES_NOT_EXIST" is from
+  // forbidden-ext-indirect-access-prop-caller.case
+  //
+  // If the function object "inner" has an own property
+  // named "caller", then its value will be returned.
+  //
+  // If the function object "inner" DOES NOT have an
+  // own property named "caller", then the symbol
+  // CALLER_OWN_PROPERTY_DOES_NOT_EXIST will be returned.
+  if (result !== CALLER_OWN_PROPERTY_DOES_NOT_EXIST) {
+    assert.notSameValue(result, f);
+  }
+
+  callCount++;
+};
+f();
+assert.sameValue(callCount, 1, 'body evaluated');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/forbidden-ext/b2/func-expr-forbidden-ext-indirect-access-own-prop-caller-value.js b/js/src/tests/test262/language/expressions/function/forbidden-ext/b2/func-expr-forbidden-ext-indirect-access-own-prop-caller-value.js
new file mode 100644
index 0000000000..1565c72640
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/forbidden-ext/b2/func-expr-forbidden-ext-indirect-access-own-prop-caller-value.js
@@ -0,0 +1,61 @@
+// This file was procedurally generated from the following sources:
+// - src/function-forms/forbidden-ext-indirect-access-own-prop-caller-value.case
+// - src/function-forms/forbidden-extensions/bullet-two/func-expr.template
+/*---
+description: Forbidden extension, o.caller (function expression)
+esid: sec-definitions-runtime-semantics-evaluation
+flags: [generated, noStrict]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+    If an implementation extends any function object with an own property named "caller" the value of
+    that property, as observed using [[Get]] or [[GetOwnProperty]], must not be a strict function
+    object. If it is an accessor property, the function that is the value of the property's [[Get]]
+    attribute must never return a strict function when called.
+
+---*/
+var CALLER_OWN_PROPERTY_DOES_NOT_EXIST = Symbol();
+function inner() {
+  // This property may exist, but is forbidden from having a value that is a strict function object
+  return inner.hasOwnProperty("caller")
+    ? inner.caller
+    : CALLER_OWN_PROPERTY_DOES_NOT_EXIST;
+}
+
+var callCount = 0;
+var f;
+f = function() {
+  "use strict";
+  // This and the following conditional value is set in the test's .case file.
+  // For every test that has a "true" value here, there is a
+  // corresponding test that has a "false" value here.
+  // They are generated from two different case files, which use
+  // the same templates.
+  let descriptor = Object.getOwnPropertyDescriptor(inner, "caller");
+  if (descriptor && descriptor.configurable && true) {
+    Object.defineProperty(inner, "caller", {value: 1});
+  }
+  var result = inner();
+  if (descriptor && descriptor.configurable && true) {
+    assert.sameValue(result, 1, 'If this test defined an own "caller" property on the inner function, then it should be accessible and should return the value it was set to.');
+  }
+
+  // "CALLER_OWN_PROPERTY_DOES_NOT_EXIST" is from
+  // forbidden-ext-indirect-access-prop-caller.case
+  //
+  // If the function object "inner" has an own property
+  // named "caller", then its value will be returned.
+  //
+  // If the function object "inner" DOES NOT have an
+  // own property named "caller", then the symbol
+  // CALLER_OWN_PROPERTY_DOES_NOT_EXIST will be returned.
+  if (result !== CALLER_OWN_PROPERTY_DOES_NOT_EXIST) {
+    assert.notSameValue(result, f);
+  }
+
+  callCount++;
+};
+f();
+assert.sameValue(callCount, 1, 'body evaluated');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/forbidden-ext/b2/func-expr-forbidden-ext-indirect-access-prop-caller.js b/js/src/tests/test262/language/expressions/function/forbidden-ext/b2/func-expr-forbidden-ext-indirect-access-prop-caller.js
new file mode 100644
index 0000000000..4276438d1e
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/forbidden-ext/b2/func-expr-forbidden-ext-indirect-access-prop-caller.js
@@ -0,0 +1,61 @@
+// This file was procedurally generated from the following sources:
+// - src/function-forms/forbidden-ext-indirect-access-prop-caller.case
+// - src/function-forms/forbidden-extensions/bullet-two/func-expr.template
+/*---
+description: Forbidden extension, o.caller (function expression)
+esid: sec-definitions-runtime-semantics-evaluation
+flags: [generated, noStrict]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+    If an implementation extends any function object with an own property named "caller" the value of
+    that property, as observed using [[Get]] or [[GetOwnProperty]], must not be a strict function
+    object. If it is an accessor property, the function that is the value of the property's [[Get]]
+    attribute must never return a strict function when called.
+
+---*/
+var CALLER_OWN_PROPERTY_DOES_NOT_EXIST = Symbol();
+function inner() {
+  // This property may exist, but is forbidden from having a value that is a strict function object
+  return inner.hasOwnProperty("caller")
+    ? inner.caller
+    : CALLER_OWN_PROPERTY_DOES_NOT_EXIST;
+}
+
+var callCount = 0;
+var f;
+f = function() {
+  "use strict";
+  // This and the following conditional value is set in the test's .case file.
+  // For every test that has a "true" value here, there is a
+  // corresponding test that has a "false" value here.
+  // They are generated from two different case files, which use
+  // the same templates.
+  let descriptor = Object.getOwnPropertyDescriptor(inner, "caller");
+  if (descriptor && descriptor.configurable && false) {
+    Object.defineProperty(inner, "caller", {});
+  }
+  var result = inner();
+  if (descriptor && descriptor.configurable && false) {
+    assert.sameValue(result, 1, 'If this test defined an own "caller" property on the inner function, then it should be accessible and should return the value it was set to.');
+  }
+
+  // "CALLER_OWN_PROPERTY_DOES_NOT_EXIST" is from
+  // forbidden-ext-indirect-access-prop-caller.case
+  //
+  // If the function object "inner" has an own property
+  // named "caller", then its value will be returned.
+  //
+  // If the function object "inner" DOES NOT have an
+  // own property named "caller", then the symbol
+  // CALLER_OWN_PROPERTY_DOES_NOT_EXIST will be returned.
+  if (result !== CALLER_OWN_PROPERTY_DOES_NOT_EXIST) {
+    assert.notSameValue(result, f);
+  }
+
+  callCount++;
+};
+f();
+assert.sameValue(callCount, 1, 'body evaluated');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/forbidden-ext/b2/shell.js b/js/src/tests/test262/language/expressions/function/forbidden-ext/b2/shell.js
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/forbidden-ext/b2/shell.js
diff --git a/js/src/tests/test262/language/expressions/function/forbidden-ext/browser.js b/js/src/tests/test262/language/expressions/function/forbidden-ext/browser.js
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/forbidden-ext/browser.js
diff --git a/js/src/tests/test262/language/expressions/function/forbidden-ext/shell.js b/js/src/tests/test262/language/expressions/function/forbidden-ext/shell.js
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/forbidden-ext/shell.js
diff --git a/js/src/tests/test262/language/expressions/function/length-dflt.js b/js/src/tests/test262/language/expressions/function/length-dflt.js
new file mode 100644
index 0000000000..edf1b2ae3b
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/length-dflt.js
@@ -0,0 +1,62 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 14.1.6
+description: >
+  Default parameters' effect on function length
+info: |
+  Function length is counted by the non initialized parameters in the left.
+
+  9.2.4 FunctionInitialize (F, kind, ParameterList, Body, Scope)
+
+  [...]
+  2. Let len be the ExpectedArgumentCount of ParameterList.
+  3. Perform ! DefinePropertyOrThrow(F, "length", PropertyDescriptor{[[Value]]:
+     len, [[Writable]]: false, [[Enumerable]]: false, [[Configurable]]: true}).
+  [...]
+
+  FormalsList : FormalParameter
+
+    1. If HasInitializer of FormalParameter is true return 0
+    2. Return 1.
+
+  FormalsList : FormalsList , FormalParameter
+
+    1. Let count be the ExpectedArgumentCount of FormalsList.
+    2. If HasInitializer of FormalsList is true or HasInitializer of
+    FormalParameter is true, return count.
+    3. Return count+1.
+features: [default-parameters]
+includes: [propertyHelper.js]
+---*/
+
+
+var f1 = function (x = 42) {};
+
+assert.sameValue(f1.length, 0, 'FormalsList: x = 42');
+verifyNotEnumerable(f1, 'length');
+verifyNotWritable(f1, 'length');
+verifyConfigurable(f1, 'length');
+
+var f2 = function (x = 42, y) {};
+
+assert.sameValue(f2.length, 0, 'FormalsList: x = 42, y');
+verifyNotEnumerable(f2, 'length');
+verifyNotWritable(f2, 'length');
+verifyConfigurable(f2, 'length');
+
+var f3 = function (x, y = 42) {};
+
+assert.sameValue(f3.length, 1, 'FormalsList: x, y = 42');
+verifyNotEnumerable(f3, 'length');
+verifyNotWritable(f3, 'length');
+verifyConfigurable(f3, 'length');
+
+var f4 = function (x, y = 42, z) {};
+
+assert.sameValue(f4.length, 1, 'FormalsList: x, y = 42, z');
+verifyNotEnumerable(f4, 'length');
+verifyNotWritable(f4, 'length');
+verifyConfigurable(f4, 'length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/name-arguments-non-strict.js b/js/src/tests/test262/language/expressions/function/name-arguments-non-strict.js
new file mode 100644
index 0000000000..030ad8cecc
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/name-arguments-non-strict.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 13.1-3-8
+description: >
+    arguments allowed as function identifier in non-strict function
+    expression
+flags: [noStrict]
+---*/
+
+(function arguments (){});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/name-arguments-strict-body.js b/js/src/tests/test262/language/expressions/function/name-arguments-strict-body.js
new file mode 100644
index 0000000000..95e5452bb5
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/name-arguments-strict-body.js
@@ -0,0 +1,19 @@
+// |reftest| error:SyntaxError
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 13.1-42-s
+description: >
+    StrictMode - SyntaxError is thrown if 'arguments' occurs as the
+    Identifier of a FunctionExpression whose FunctionBody is contained
+    in strict code
+negative:
+  phase: parse
+  type: SyntaxError
+flags: [noStrict]
+---*/
+
+$DONOTEVALUATE();
+
+(function arguments() {'use strict';});
diff --git a/js/src/tests/test262/language/expressions/function/name-arguments-strict-strict.js b/js/src/tests/test262/language/expressions/function/name-arguments-strict-strict.js
new file mode 100644
index 0000000000..593176857d
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/name-arguments-strict-strict.js
@@ -0,0 +1,19 @@
+// |reftest| error:SyntaxError
+'use strict';
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 13.1-14-s
+description: >
+    StrictMode - SyntaxError is thrown if 'arguments' occurs as the
+    Identifier of a FunctionExpression in strict mode
+negative:
+  phase: parse
+  type: SyntaxError
+flags: [onlyStrict]
+---*/
+
+$DONOTEVALUATE();
+
+(function arguments() {});
diff --git a/js/src/tests/test262/language/expressions/function/name-eval-non-strict.js b/js/src/tests/test262/language/expressions/function/name-eval-non-strict.js
new file mode 100644
index 0000000000..f01fda4c12
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/name-eval-non-strict.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 13.1-3-2
+description: >
+    eval allowed as function identifier in non-strict function
+    expression
+flags: [noStrict]
+---*/
+
+(function eval(){});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/name-eval-strict-body.js b/js/src/tests/test262/language/expressions/function/name-eval-strict-body.js
new file mode 100644
index 0000000000..ce9e8f759b
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/name-eval-strict-body.js
@@ -0,0 +1,19 @@
+// |reftest| error:SyntaxError
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 13.1-38-s
+description: >
+    StrictMode - SyntaxError is thrown if 'eval' occurs as the
+    Identifier of a FunctionExpression whose FunctionBody is contained
+    in strict code
+negative:
+  phase: parse
+  type: SyntaxError
+flags: [noStrict]
+---*/
+
+$DONOTEVALUATE();
+
+(function eval() {'use strict';});
diff --git a/js/src/tests/test262/language/expressions/function/name-eval-strict-strict.js b/js/src/tests/test262/language/expressions/function/name-eval-strict-strict.js
new file mode 100644
index 0000000000..01d55428d2
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/name-eval-strict-strict.js
@@ -0,0 +1,19 @@
+// |reftest| error:SyntaxError
+'use strict';
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 13.1-12-s
+description: >
+    StrictMode - SyntaxError is thrown if 'eval' occurs as the
+    Identifier of a FunctionExpression in strict mode
+negative:
+  phase: parse
+  type: SyntaxError
+flags: [onlyStrict]
+---*/
+
+$DONOTEVALUATE();
+
+(function eval() {});
diff --git a/js/src/tests/test262/language/expressions/function/name-eval-stricteval.js b/js/src/tests/test262/language/expressions/function/name-eval-stricteval.js
new file mode 100644
index 0000000000..bcfeaac1c3
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/name-eval-stricteval.js
@@ -0,0 +1,17 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 13.1-37-s
+description: >
+    StrictMode - SyntaxError is thrown if 'eval' occurs as the
+    Identifier of a FunctionExpression in strict eval code
+flags: [noStrict]
+---*/
+
+        var _13_1_37_s = {};
+assert.throws(SyntaxError, function() {
+            eval("'use strict'; _13_1_37_s.x = function eval() {};");
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/name.js b/js/src/tests/test262/language/expressions/function/name.js
new file mode 100644
index 0000000000..f22b407883
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/name.js
@@ -0,0 +1,38 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-function-definitions-runtime-semantics-evaluation
+description: Assignment of function `name` attribute
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+    1. Let scope be the LexicalEnvironment of the running execution context.
+    2. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+       scope, "").
+    ...
+    5. Return closure.
+
+    FunctionExpression : function BindingIdentifier ( FormalParameters ) { FunctionBody }
+
+    1. Let scope be the running execution context's LexicalEnvironment.
+    2. Let funcEnv be NewDeclarativeEnvironment(scope).
+    3. Let envRec be funcEnv's EnvironmentRecord.
+    4. Let name be StringValue of BindingIdentifier.
+    5. Perform envRec.CreateImmutableBinding(name, false).
+    6. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+       funcEnv, name).
+    ...
+    10. Return closure.
+includes: [propertyHelper.js]
+---*/
+
+verifyProperty(function() {}, "name", {
+  value: "", writable: false, enumerable: false, configurable: true
+});
+
+verifyProperty(function func() {}, "name", {
+  value: "func", writable: false, enumerable: false, configurable: true
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/named-no-strict-reassign-fn-name-in-body-in-arrow.js b/js/src/tests/test262/language/expressions/function/named-no-strict-reassign-fn-name-in-body-in-arrow.js
new file mode 100644
index 0000000000..e252daeb6b
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/named-no-strict-reassign-fn-name-in-body-in-arrow.js
@@ -0,0 +1,26 @@
+// This file was procedurally generated from the following sources:
+// - src/function-forms/reassign-fn-name-in-body-in-arrow.case
+// - src/function-forms/expr-named/func-expr-named-no-strict.template
+/*---
+description: Reassignment of function name is silently ignored in non-strict mode code. (named function expression in non-strict mode code)
+esid: sec-function-definitions-runtime-semantics-evaluation
+flags: [generated, noStrict]
+info: |
+    FunctionExpression : function BindingIdentifier ( FormalParameters ) { FunctionBody }
+
+---*/
+
+// increment callCount in case "body"
+let callCount = 0;
+let ref = function BindingIdentifier() {
+  callCount++;
+  (() => {
+    BindingIdentifier = 1;
+  })();
+  return BindingIdentifier;
+};
+
+assert.sameValue(ref(), ref);
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/named-no-strict-reassign-fn-name-in-body-in-eval.js b/js/src/tests/test262/language/expressions/function/named-no-strict-reassign-fn-name-in-body-in-eval.js
new file mode 100644
index 0000000000..57960fc9df
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/named-no-strict-reassign-fn-name-in-body-in-eval.js
@@ -0,0 +1,24 @@
+// This file was procedurally generated from the following sources:
+// - src/function-forms/reassign-fn-name-in-body-in-eval.case
+// - src/function-forms/expr-named/func-expr-named-no-strict.template
+/*---
+description: Reassignment of function name is silently ignored in non-strict mode code. (named function expression in non-strict mode code)
+esid: sec-function-definitions-runtime-semantics-evaluation
+flags: [generated, noStrict]
+info: |
+    FunctionExpression : function BindingIdentifier ( FormalParameters ) { FunctionBody }
+
+---*/
+
+// increment callCount in case "body"
+let callCount = 0;
+let ref = function BindingIdentifier() {
+  callCount++;
+  eval("BindingIdentifier = 1");
+  return BindingIdentifier;
+};
+
+assert.sameValue(ref(), ref);
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/named-no-strict-reassign-fn-name-in-body.js b/js/src/tests/test262/language/expressions/function/named-no-strict-reassign-fn-name-in-body.js
new file mode 100644
index 0000000000..60d9da1cde
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/named-no-strict-reassign-fn-name-in-body.js
@@ -0,0 +1,24 @@
+// This file was procedurally generated from the following sources:
+// - src/function-forms/reassign-fn-name-in-body.case
+// - src/function-forms/expr-named/func-expr-named-no-strict.template
+/*---
+description: Reassignment of function name is silently ignored in non-strict mode code. (named function expression in non-strict mode code)
+esid: sec-function-definitions-runtime-semantics-evaluation
+flags: [generated, noStrict]
+info: |
+    FunctionExpression : function BindingIdentifier ( FormalParameters ) { FunctionBody }
+
+---*/
+
+// increment callCount in case "body"
+let callCount = 0;
+let ref = function BindingIdentifier() {
+  callCount++;
+  BindingIdentifier = 1;
+  return BindingIdentifier;
+};
+
+assert.sameValue(ref(), ref);
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/named-strict-error-reassign-fn-name-in-body-in-arrow-strict.js b/js/src/tests/test262/language/expressions/function/named-strict-error-reassign-fn-name-in-body-in-arrow-strict.js
new file mode 100644
index 0000000000..ab9fed2175
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/named-strict-error-reassign-fn-name-in-body-in-arrow-strict.js
@@ -0,0 +1,29 @@
+'use strict';
+// This file was procedurally generated from the following sources:
+// - src/function-forms/reassign-fn-name-in-body-in-arrow.case
+// - src/function-forms/expr-named/func-expr-named-strict-error.template
+/*---
+description: Reassignment of function name is silently ignored in non-strict mode code. (named function expression in strict mode code)
+esid: sec-function-definitions-runtime-semantics-evaluation
+flags: [generated, onlyStrict]
+info: |
+    FunctionExpression : function BindingIdentifier ( FormalParameters ) { FunctionBody }
+
+---*/
+
+// increment callCount in case "body"
+let callCount = 0;
+let ref = function BindingIdentifier() {
+  callCount++;
+  (() => {
+    BindingIdentifier = 1;
+  })();
+  return BindingIdentifier;
+};
+
+assert.throws(TypeError, () => {
+  ref();
+});
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/named-strict-error-reassign-fn-name-in-body-in-eval-strict.js b/js/src/tests/test262/language/expressions/function/named-strict-error-reassign-fn-name-in-body-in-eval-strict.js
new file mode 100644
index 0000000000..278798315f
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/named-strict-error-reassign-fn-name-in-body-in-eval-strict.js
@@ -0,0 +1,27 @@
+'use strict';
+// This file was procedurally generated from the following sources:
+// - src/function-forms/reassign-fn-name-in-body-in-eval.case
+// - src/function-forms/expr-named/func-expr-named-strict-error.template
+/*---
+description: Reassignment of function name is silently ignored in non-strict mode code. (named function expression in strict mode code)
+esid: sec-function-definitions-runtime-semantics-evaluation
+flags: [generated, onlyStrict]
+info: |
+    FunctionExpression : function BindingIdentifier ( FormalParameters ) { FunctionBody }
+
+---*/
+
+// increment callCount in case "body"
+let callCount = 0;
+let ref = function BindingIdentifier() {
+  callCount++;
+  eval("BindingIdentifier = 1");
+  return BindingIdentifier;
+};
+
+assert.throws(TypeError, () => {
+  ref();
+});
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/named-strict-error-reassign-fn-name-in-body-strict.js b/js/src/tests/test262/language/expressions/function/named-strict-error-reassign-fn-name-in-body-strict.js
new file mode 100644
index 0000000000..df7b85b637
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/named-strict-error-reassign-fn-name-in-body-strict.js
@@ -0,0 +1,27 @@
+'use strict';
+// This file was procedurally generated from the following sources:
+// - src/function-forms/reassign-fn-name-in-body.case
+// - src/function-forms/expr-named/func-expr-named-strict-error.template
+/*---
+description: Reassignment of function name is silently ignored in non-strict mode code. (named function expression in strict mode code)
+esid: sec-function-definitions-runtime-semantics-evaluation
+flags: [generated, onlyStrict]
+info: |
+    FunctionExpression : function BindingIdentifier ( FormalParameters ) { FunctionBody }
+
+---*/
+
+// increment callCount in case "body"
+let callCount = 0;
+let ref = function BindingIdentifier() {
+  callCount++;
+  BindingIdentifier = 1;
+  return BindingIdentifier;
+};
+
+assert.throws(TypeError, () => {
+  ref();
+});
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/object-destructuring-param-strict-body.js b/js/src/tests/test262/language/expressions/function/object-destructuring-param-strict-body.js
new file mode 100644
index 0000000000..1e401e31ec
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/object-destructuring-param-strict-body.js
@@ -0,0 +1,133 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/function-forms/object-destructuring-param-strict-body.case
+// - src/function-forms/syntax/func-expr.template
+/*---
+description: ObjectBindingPattern and Use Strict Directive are not allowed to coexist for the same function. (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [rest-parameters]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.4 Static Semantics: IsSimpleParameterList
+
+    BindingElement : BindingPattern
+
+    1. Return false.
+
+    14.1.2 Static Semantics: Early Errors
+
+    FunctionDeclaration : function BindingIdentifier ( FormalParameters ) { FunctionBody }
+    FunctionDeclaration : function ( FormalParameters ) { FunctionBody }
+    FunctionExpression : function BindingIdentifier ( FormalParameters ) { FunctionBody }
+
+    - It is a Syntax Error if ContainsUseStrict of FunctionBody is true and
+      IsSimpleParameterList of FormalParameters is false.
+
+    14.2.1 Static Semantics: Early Errors
+
+    ArrowFunction : ArrowParameters => ConciseBody
+
+    - It is a Syntax Error if ContainsUseStrict of ConciseBody is true and
+      IsSimpleParameterList of ArrowParameters is false.
+
+    14.3.1 Static Semantics: Early Errors
+
+    MethodDefinition : PropertyName ( UniqueFormalParameters ) { FunctionBody }
+
+    - It is a Syntax Error if ContainsUseStrict of FunctionBody is true and
+      IsSimpleParameterList of UniqueFormalParameters is false.
+
+    MethodDefinition : set PropertyName ( PropertySetParameterList ) { FunctionBody }
+
+    - It is a Syntax Error if ContainsUseStrict of FunctionBody is true and
+      IsSimpleParameterList of PropertySetParameterList is false.
+
+    14.4.1 Static Semantics: Early Errors
+
+    GeneratorMethod : * PropertyName ( UniqueFormalParameters ) { GeneratorBody }
+
+    - It is a Syntax Error if ContainsUseStrict of GeneratorBody is true and
+      IsSimpleParameterList of UniqueFormalParameters is false.
+
+    GeneratorDeclaration : function * BindingIdentifier ( FormalParameters ) { GeneratorBody }
+    GeneratorDeclaration : function * ( FormalParameters ) { GeneratorBody }
+    GeneratorExpression : function * BindingIdentifier ( FormalParameters ) { GeneratorBody }
+
+    - It is a Syntax Error if ContainsUseStrict of GeneratorBody is true and
+      IsSimpleParameterList of UniqueFormalParameters is false.
+
+    14.5.1 Static Semantics: Early Errors
+
+    AsyncGeneratorMethod : async * PropertyName ( UniqueFormalParameters ) { AsyncGeneratorBody }
+
+    - It is a Syntax Error if ContainsUseStrict of AsyncGeneratorBody is true and
+      IsSimpleParameterList of UniqueFormalParameters is false.
+
+    AsyncGeneratorDeclaration : async function * BindingIdentifier ( FormalParameters ) { AsyncGeneratorBody }
+    AsyncGeneratorDeclaration : async function * ( FormalParameters ) { AsyncGeneratorBody }
+    AsyncGeneratorExpression : async function * BindingIdentifier ( FormalParameters ) { AsyncGeneratorBody }
+
+    - It is a Syntax Error if ContainsUseStrict of AsyncGeneratorBody is true and
+      IsSimpleParameterList of FormalParameters is false.
+
+    14.7.1 Static Semantics: Early Errors
+
+    AsyncMethod : async PropertyName ( UniqueFormalParameters ) { AsyncFunctionBody }
+
+    - It is a Syntax Error if ContainsUseStrict of AsyncFunctionBody is true and
+      IsSimpleParameterList of UniqueFormalParameters is false.
+
+    AsyncFunctionDeclaration : async function BindingIdentifier ( FormalParameters ) { AsyncFunctionBody }
+    AsyncFunctionDeclaration : async function ( FormalParameters ) { AsyncFunctionBody }
+    AsyncFunctionExpression : async function ( FormalParameters ) { AsyncFunctionBody }
+    AsyncFunctionExpression : async function BindingIdentifier ( FormalParameters ) { AsyncFunctionBody }
+
+    - It is a Syntax Error if ContainsUseStrict of AsyncFunctionBody is true and
+      IsSimpleParameterList of FormalParameters is false.
+
+    14.8.1 Static Semantics: Early Errors
+
+    AsyncArrowFunction : CoverCallExpressionAndAsyncArrowHead => AsyncConciseBody
+
+    - It is a Syntax Error if ContainsUseStrict of AsyncConciseBody is true and
+      IsSimpleParameterList of CoverCallExpressionAndAsyncArrowHead is false.
+
+---*/
+$DONOTEVALUATE();
+
+0, function({property}) {
+  "use strict";
+};
diff --git a/js/src/tests/test262/language/expressions/function/param-arguments-non-strict.js b/js/src/tests/test262/language/expressions/function/param-arguments-non-strict.js
new file mode 100644
index 0000000000..010e3c4394
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/param-arguments-non-strict.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 13.1-2-6
+description: >
+    arguments allowed as formal parameter name of a non-strict
+    function expression
+flags: [noStrict]
+---*/
+
+(function foo(arguments){});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/param-dflt-yield-non-strict.js b/js/src/tests/test262/language/expressions/function/param-dflt-yield-non-strict.js
new file mode 100644
index 0000000000..2b47209a5e
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/param-dflt-yield-non-strict.js
@@ -0,0 +1,29 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-function-definitions
+es6id: 14.1
+description: >
+  The `yield` token is interpreted as an IdentifierReference within a generator
+  and outside of strict mode
+info: |
+  FunctionExpression :
+    function BindingIdentifieropt ( FormalParameters ) { FunctionBody }
+features: [generators, default-parameters]
+flags: [noStrict]
+---*/
+
+var yield = 23;
+var paramValue;
+
+function *g() {
+  (function(x = yield) {
+    paramValue = x;
+  }());
+}
+
+g().next();
+
+assert.sameValue(paramValue, 23);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/param-dflt-yield-strict-strict.js b/js/src/tests/test262/language/expressions/function/param-dflt-yield-strict-strict.js
new file mode 100644
index 0000000000..3173fee194
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/param-dflt-yield-strict-strict.js
@@ -0,0 +1,27 @@
+// |reftest| error:SyntaxError
+'use strict';
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-function-definitions
+es6id: 14.1
+description: >
+  The `yield` token is interpreted as an IdentifierReference within a generator
+  and outside of strict mode
+info: |
+  FunctionExpression :
+    function BindingIdentifieropt ( FormalParameters ) { FunctionBody }
+features: [generators, default-parameters]
+flags: [onlyStrict]
+negative:
+  phase: parse
+  type: SyntaxError
+---*/
+
+$DONOTEVALUATE();
+
+function *g() {
+  0, function(x = yield) {
+    paramValue = x;
+  };
+}
diff --git a/js/src/tests/test262/language/expressions/function/param-duplicated-non-strict.js b/js/src/tests/test262/language/expressions/function/param-duplicated-non-strict.js
new file mode 100644
index 0000000000..b4c26e1bec
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/param-duplicated-non-strict.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 13.1-1-2
+description: >
+    Duplicate identifier allowed in non-strict function expression
+    parameter list
+flags: [noStrict]
+---*/
+
+(function foo(a,a){});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/param-duplicated-strict-1-strict.js b/js/src/tests/test262/language/expressions/function/param-duplicated-strict-1-strict.js
new file mode 100644
index 0000000000..65fe3dce50
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/param-duplicated-strict-1-strict.js
@@ -0,0 +1,24 @@
+// |reftest| error:SyntaxError
+'use strict';
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    Refer 13.1;
+    It is a SyntaxError if any Identifier value occurs more than once within a FormalParameterList of a strict mode
+    FunctionDeclaration or FunctionExpression.
+es5id: 13.1-8-s
+description: >
+    Strict Mode - SyntaxError is thrown if a function is created in
+    'strict mode' using a FunctionExpression and the function has two
+    identical parameters
+negative:
+  phase: parse
+  type: SyntaxError
+flags: [onlyStrict]
+---*/
+
+$DONOTEVALUATE();
+
+(function (param, param) { });
diff --git a/js/src/tests/test262/language/expressions/function/param-duplicated-strict-2-strict.js b/js/src/tests/test262/language/expressions/function/param-duplicated-strict-2-strict.js
new file mode 100644
index 0000000000..e94bd31573
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/param-duplicated-strict-2-strict.js
@@ -0,0 +1,25 @@
+// |reftest| error:SyntaxError
+'use strict';
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    Refer 13.1;
+    It is a SyntaxError if any Identifier value occurs more than once within a FormalParameterList of a strict mode
+    FunctionDeclaration or FunctionExpression.
+es5id: 13.1-9-s
+description: >
+    Strict Mode - SyntaxError is thrown if a function is created in
+    'strict mode' using a FunctionExpression and the function has two
+    identical parameters, which are separated by a unique parameter
+    name
+negative:
+  phase: parse
+  type: SyntaxError
+flags: [onlyStrict]
+---*/
+
+$DONOTEVALUATE();
+
+(function (param1, param2, param1) { });
diff --git a/js/src/tests/test262/language/expressions/function/param-duplicated-strict-3-strict.js b/js/src/tests/test262/language/expressions/function/param-duplicated-strict-3-strict.js
new file mode 100644
index 0000000000..d88fddab0d
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/param-duplicated-strict-3-strict.js
@@ -0,0 +1,24 @@
+// |reftest| error:SyntaxError
+'use strict';
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    Refer 13.1;
+    It is a SyntaxError if any Identifier value occurs more than once within a FormalParameterList of a strict mode
+    FunctionDeclaration or FunctionExpression.
+es5id: 13.1-10-s
+description: >
+    Strict Mode - SyntaxError is thrown if a function is created in
+    'strict mode' using a FunctionExpression and the function has
+    three identical parameters
+negative:
+  phase: parse
+  type: SyntaxError
+flags: [onlyStrict]
+---*/
+
+$DONOTEVALUATE();
+
+(function (param, param, param) { });
diff --git a/js/src/tests/test262/language/expressions/function/param-duplicated-strict-body-1.js b/js/src/tests/test262/language/expressions/function/param-duplicated-strict-body-1.js
new file mode 100644
index 0000000000..ac130ef625
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/param-duplicated-strict-body-1.js
@@ -0,0 +1,23 @@
+// |reftest| error:SyntaxError
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    Refer 13.1;
+    It is a SyntaxError if any Identifier value occurs more than once within a FormalParameterList of a strict mode
+    FunctionDeclaration or FunctionExpression.
+es5id: 13.1-30-s
+description: >
+    Strict Mode - SyntaxError is thrown if a function is created using
+    a FunctionExpression whose FunctionBody is contained in strict
+    code and the function has two identical parameters
+negative:
+  phase: parse
+  type: SyntaxError
+flags: [noStrict]
+---*/
+
+$DONOTEVALUATE();
+
+(function (param, param) { 'use strict'; });
diff --git a/js/src/tests/test262/language/expressions/function/param-duplicated-strict-body-2.js b/js/src/tests/test262/language/expressions/function/param-duplicated-strict-body-2.js
new file mode 100644
index 0000000000..aac1570ad8
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/param-duplicated-strict-body-2.js
@@ -0,0 +1,24 @@
+// |reftest| error:SyntaxError
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    Refer 13.1;
+    It is a SyntaxError if any Identifier value occurs more than once within a FormalParameterList of a strict mode
+    FunctionDeclaration or FunctionExpression.
+es5id: 13.1-32-s
+description: >
+    Strict Mode - SyntaxError is thrown if a function is created using
+    a FunctionExpression whose FunctionBody is strict and the function
+    has two identical parameters, which are separated by a unique
+    parameter name
+negative:
+  phase: parse
+  type: SyntaxError
+flags: [noStrict]
+---*/
+
+$DONOTEVALUATE();
+
+(function (param1, param2, param1) { 'use strict'; });
diff --git a/js/src/tests/test262/language/expressions/function/param-duplicated-strict-body-3.js b/js/src/tests/test262/language/expressions/function/param-duplicated-strict-body-3.js
new file mode 100644
index 0000000000..4a791e5446
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/param-duplicated-strict-body-3.js
@@ -0,0 +1,22 @@
+// |reftest| error:SyntaxError
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    Refer 13.1;
+    It is a SyntaxError if any Identifier value occurs more than once within a FormalParameterList of a strict mode
+    FunctionDeclaration or FunctionExpression.
+es5id: 13.1-34-s
+description: >
+    Strict Mode - SyntaxError is thrown if a function declaration has
+    three identical parameters with a strict mode body
+negative:
+  phase: parse
+  type: SyntaxError
+flags: [noStrict]
+---*/
+
+$DONOTEVALUATE();
+
+(function (param, param, param) { 'use strict'; });
diff --git a/js/src/tests/test262/language/expressions/function/param-eval-non-strict-is-correct-value.js b/js/src/tests/test262/language/expressions/function/param-eval-non-strict-is-correct-value.js
new file mode 100644
index 0000000000..dadd048b68
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/param-eval-non-strict-is-correct-value.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2020 Rick Waldron.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-strict-mode-of-ecmascript
+description: >
+    eval allowed as formal parameter name of a non-strict function expression
+flags: [noStrict]
+---*/
+
+let exprCallCount = 0;
+let evalValue = {};
+
+let foo = function(eval) {
+  assert.sameValue(eval, evalValue);
+  exprCallCount += 1;
+};
+
+foo(evalValue);
+
+assert.sameValue(exprCallCount, 1);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/param-eval-non-strict.js b/js/src/tests/test262/language/expressions/function/param-eval-non-strict.js
new file mode 100644
index 0000000000..042cc1c50b
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/param-eval-non-strict.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 13.1-2-2
+description: >
+    eval allowed as formal parameter name of a non-strict function
+    expression
+flags: [noStrict]
+---*/
+
+(function foo(eval){});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/param-eval-strict-body.js b/js/src/tests/test262/language/expressions/function/param-eval-strict-body.js
new file mode 100644
index 0000000000..676ddeb3ed
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/param-eval-strict-body.js
@@ -0,0 +1,23 @@
+// |reftest| error:SyntaxError
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    Refer 13.1;
+    It is a SyntaxError if the Identifier "eval" or the Identifier "arguments" occurs within a FormalParameterList
+    of a strict mode FunctionDeclaration or FunctionExpression.
+es5id: 13.1-18-s
+description: >
+    StrictMode - SyntaxError is thrown if the identifier 'eval'
+    appears within a FormalParameterList of a strict mode
+    FunctionExpression when FuctionBody is strict code
+negative:
+  phase: parse
+  type: SyntaxError
+flags: [noStrict]
+---*/
+
+$DONOTEVALUATE();
+
+(function (eval) { 'use strict'; });
diff --git a/js/src/tests/test262/language/expressions/function/param-eval-stricteval.js b/js/src/tests/test262/language/expressions/function/param-eval-stricteval.js
new file mode 100644
index 0000000000..2bdfac4ae1
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/param-eval-stricteval.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    Refer 13.1; 
+    It is a SyntaxError if the Identifier "eval" or the Identifier "arguments" occurs within a FormalParameterList
+    of a strict mode FunctionDeclaration or FunctionExpression.
+es5id: 13.1-17-s
+description: >
+    StrictMode - SyntaxError is thrown if the identifier 'eval'
+    appears within a FormalParameterList of a strict mode
+    FunctionExpression in strict eval code
+flags: [noStrict]
+---*/
+
+
+assert.throws(SyntaxError, function() {
+            eval("'use strict'; var _13_1_17_fun = function (eval) { }");
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/params-dflt-args-unmapped.js b/js/src/tests/test262/language/expressions/function/params-dflt-args-unmapped.js
new file mode 100644
index 0000000000..daf25a8e78
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/params-dflt-args-unmapped.js
@@ -0,0 +1,84 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+description: Referencing the arguments object from a default parameter (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+es6id: 14.1.20
+features: [default-parameters]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    14.1.19 Runtime Semantics: IteratorBindingInitialization
+
+    FormalsList : FormalsList , FormalParameter
+
+    1. Let status be the result of performing IteratorBindingInitialization for
+       FormalsList using iteratorRecord and environment as the arguments.
+    2. ReturnIfAbrupt(status).
+    3. Return the result of performing IteratorBindingInitialization for
+       FormalParameter using iteratorRecord and environment as the arguments. 
+---*/
+
+var callCount = 0;
+var f;
+f = function(x, _ = 0) {
+  assert.sameValue(x, undefined, 'parameter binding value (initial)');
+  assert.sameValue(
+    arguments[0], undefined, 'arguments property value (initial)'
+  );
+
+  arguments[0] = 1;
+
+  assert.sameValue(
+    x, undefined, 'parameter binding value (after arguments modification)'
+  );
+  assert.sameValue(
+    arguments[0], 1, 'arguments property value (after arguments modification)'
+  );
+
+  x = 2;
+
+  assert.sameValue(
+    x, 2, 'parameter binding value (after parameter binding modification)'
+  );
+  assert.sameValue(
+    arguments[0],
+    1,
+    'arguments property value (after parameter binding modification)'
+  );
+  callCount = callCount + 1;
+};
+
+f();
+
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/params-dflt-ref-arguments.js b/js/src/tests/test262/language/expressions/function/params-dflt-ref-arguments.js
new file mode 100644
index 0000000000..3bee227fa6
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/params-dflt-ref-arguments.js
@@ -0,0 +1,63 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+description: Referencing the arguments object from a default parameter (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+es6id: 14.1.20
+features: [default-parameters]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    14.1.19 Runtime Semantics: IteratorBindingInitialization
+
+    FormalsList : FormalsList , FormalParameter
+
+    1. Let status be the result of performing IteratorBindingInitialization for
+       FormalsList using iteratorRecord and environment as the arguments.
+    2. ReturnIfAbrupt(status).
+    3. Return the result of performing IteratorBindingInitialization for
+       FormalParameter using iteratorRecord and environment as the arguments.
+---*/
+
+var callCount = 0;
+var f;
+f = function(x = arguments[2], y = arguments[3], z) {
+  assert.sameValue(x, 'third', 'first parameter');
+  assert.sameValue(y, 'fourth', 'second parameter');
+  assert.sameValue(z, 'third', 'third parameter');
+  callCount = callCount + 1;
+};
+
+f(undefined, undefined, 'third', 'fourth');
+
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/params-trailing-comma-multiple.js b/js/src/tests/test262/language/expressions/function/params-trailing-comma-multiple.js
new file mode 100644
index 0000000000..8f8a1a2b73
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/params-trailing-comma-multiple.js
@@ -0,0 +1,61 @@
+// This file was procedurally generated from the following sources:
+// - src/function-forms/params-trailing-comma-multiple.case
+// - src/function-forms/default/func-expr.template
+/*---
+description: A trailing comma should not increase the respective length, using multiple parameters (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    Trailing comma in the parameters list
+
+    14.1 Function Definitions
+
+    FormalParameters[Yield, Await] : FormalParameterList[?Yield, ?Await] ,
+---*/
+
+var callCount = 0;
+// Stores a reference `ref` for case evaluation
+var ref;
+ref = function(a, b,) {
+  assert.sameValue(a, 42);
+  assert.sameValue(b, 39);
+  callCount = callCount + 1;
+};
+
+ref(42, 39, 1);
+
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+assert.sameValue(ref.length, 2, 'length is properly set');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/params-trailing-comma-single.js b/js/src/tests/test262/language/expressions/function/params-trailing-comma-single.js
new file mode 100644
index 0000000000..a91ca4ce6a
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/params-trailing-comma-single.js
@@ -0,0 +1,60 @@
+// This file was procedurally generated from the following sources:
+// - src/function-forms/params-trailing-comma-single.case
+// - src/function-forms/default/func-expr.template
+/*---
+description: A trailing comma should not increase the respective length, using a single parameter (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+flags: [generated]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    Trailing comma in the parameters list
+
+    14.1 Function Definitions
+
+    FormalParameters[Yield, Await] : FormalParameterList[?Yield, ?Await] ,
+---*/
+
+var callCount = 0;
+// Stores a reference `ref` for case evaluation
+var ref;
+ref = function(a,) {
+  assert.sameValue(a, 42);
+  callCount = callCount + 1;
+};
+
+ref(42, 39);
+
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+assert.sameValue(ref.length, 1, 'length is properly set');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/rest-param-strict-body.js b/js/src/tests/test262/language/expressions/function/rest-param-strict-body.js
new file mode 100644
index 0000000000..2aa8e37cbe
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/rest-param-strict-body.js
@@ -0,0 +1,133 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/function-forms/rest-param-strict-body.case
+// - src/function-forms/syntax/func-expr.template
+/*---
+description: RestParameter and Use Strict Directive are not allowed to coexist for the same function. (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [rest-parameters]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    14.1.13 Static Semantics: IsSimpleParameterList
+
+    FormalParameters : FormalParameterList , FunctionRestParameter
+
+    1. Return false.
+
+    14.1.2 Static Semantics: Early Errors
+
+    FunctionDeclaration : function BindingIdentifier ( FormalParameters ) { FunctionBody }
+    FunctionDeclaration : function ( FormalParameters ) { FunctionBody }
+    FunctionExpression : function BindingIdentifier ( FormalParameters ) { FunctionBody }
+
+    - It is a Syntax Error if ContainsUseStrict of FunctionBody is true and
+      IsSimpleParameterList of FormalParameters is false.
+
+    14.2.1 Static Semantics: Early Errors
+
+    ArrowFunction : ArrowParameters => ConciseBody
+
+    - It is a Syntax Error if ContainsUseStrict of ConciseBody is true and
+      IsSimpleParameterList of ArrowParameters is false.
+
+    14.3.1 Static Semantics: Early Errors
+
+    MethodDefinition : PropertyName ( UniqueFormalParameters ) { FunctionBody }
+
+    - It is a Syntax Error if ContainsUseStrict of FunctionBody is true and
+      IsSimpleParameterList of UniqueFormalParameters is false.
+
+    MethodDefinition : set PropertyName ( PropertySetParameterList ) { FunctionBody }
+
+    - It is a Syntax Error if ContainsUseStrict of FunctionBody is true and
+      IsSimpleParameterList of PropertySetParameterList is false.
+
+    14.4.1 Static Semantics: Early Errors
+
+    GeneratorMethod : * PropertyName ( UniqueFormalParameters ) { GeneratorBody }
+
+    - It is a Syntax Error if ContainsUseStrict of GeneratorBody is true and
+      IsSimpleParameterList of UniqueFormalParameters is false.
+
+    GeneratorDeclaration : function * BindingIdentifier ( FormalParameters ) { GeneratorBody }
+    GeneratorDeclaration : function * ( FormalParameters ) { GeneratorBody }
+    GeneratorExpression : function * BindingIdentifier ( FormalParameters ) { GeneratorBody }
+
+    - It is a Syntax Error if ContainsUseStrict of GeneratorBody is true and
+      IsSimpleParameterList of UniqueFormalParameters is false.
+
+    14.5.1 Static Semantics: Early Errors
+
+    AsyncGeneratorMethod : async * PropertyName ( UniqueFormalParameters ) { AsyncGeneratorBody }
+
+    - It is a Syntax Error if ContainsUseStrict of AsyncGeneratorBody is true and
+      IsSimpleParameterList of UniqueFormalParameters is false.
+
+    AsyncGeneratorDeclaration : async function * BindingIdentifier ( FormalParameters ) { AsyncGeneratorBody }
+    AsyncGeneratorDeclaration : async function * ( FormalParameters ) { AsyncGeneratorBody }
+    AsyncGeneratorExpression : async function * BindingIdentifier ( FormalParameters ) { AsyncGeneratorBody }
+
+    - It is a Syntax Error if ContainsUseStrict of AsyncGeneratorBody is true and
+      IsSimpleParameterList of FormalParameters is false.
+
+    14.7.1 Static Semantics: Early Errors
+
+    AsyncMethod : async PropertyName ( UniqueFormalParameters ) { AsyncFunctionBody }
+
+    - It is a Syntax Error if ContainsUseStrict of AsyncFunctionBody is true and
+      IsSimpleParameterList of UniqueFormalParameters is false.
+
+    AsyncFunctionDeclaration : async function BindingIdentifier ( FormalParameters ) { AsyncFunctionBody }
+    AsyncFunctionDeclaration : async function ( FormalParameters ) { AsyncFunctionBody }
+    AsyncFunctionExpression : async function ( FormalParameters ) { AsyncFunctionBody }
+    AsyncFunctionExpression : async function BindingIdentifier ( FormalParameters ) { AsyncFunctionBody }
+
+    - It is a Syntax Error if ContainsUseStrict of AsyncFunctionBody is true and
+      IsSimpleParameterList of FormalParameters is false.
+
+    14.8.1 Static Semantics: Early Errors
+
+    AsyncArrowFunction : CoverCallExpressionAndAsyncArrowHead => AsyncConciseBody
+
+    - It is a Syntax Error if ContainsUseStrict of AsyncConciseBody is true and
+      IsSimpleParameterList of CoverCallExpressionAndAsyncArrowHead is false.
+
+---*/
+$DONOTEVALUATE();
+
+0, function(a,...rest) {
+  "use strict";
+};
diff --git a/js/src/tests/test262/language/expressions/function/rest-params-trailing-comma-early-error.js b/js/src/tests/test262/language/expressions/function/rest-params-trailing-comma-early-error.js
new file mode 100644
index 0000000000..ad4dd97438
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/rest-params-trailing-comma-early-error.js
@@ -0,0 +1,58 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/function-forms/rest-params-trailing-comma-early-error.case
+// - src/function-forms/syntax/func-expr.template
+/*---
+description: It's a syntax error if a FunctionRestParameter is followed by a trailing comma (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    Trailing comma in the parameters list
+
+    14.1 Function Definitions
+
+    FormalParameters[Yield, Await] :
+        [empty]
+        FunctionRestParameter[?Yield, ?Await]
+        FormalParameterList[?Yield, ?Await]
+        FormalParameterList[?Yield, ?Await] ,
+        FormalParameterList[?Yield, ?Await] , FunctionRestParameter[?Yield, ?Await]
+---*/
+$DONOTEVALUATE();
+
+0, function(...a,) {
+  
+};
diff --git a/js/src/tests/test262/language/expressions/function/scope-body-lex-distinct.js b/js/src/tests/test262/language/expressions/function/scope-body-lex-distinct.js
new file mode 100644
index 0000000000..7cba86042e
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/scope-body-lex-distinct.js
@@ -0,0 +1,51 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-functiondeclarationinstantiation
+description: >
+    Creation of new lexical environment (distinct from the variable
+    environment) for the function body outside of strict mode
+info: |
+    [...]
+    29. If strict is false, then
+        a. Let lexEnv be NewDeclarativeEnvironment(varEnv).
+        b. NOTE: Non-strict functions use a separate lexical Environment Record
+           for top-level lexical declarations so that a direct eval can
+           determine whether any var scoped declarations introduced by the eval
+           code conflict with pre-existing top-level lexically scoped
+           declarations.  This is not needed for strict functions because a
+           strict direct eval always places all declarations into a new
+           Environment Record.
+    [...]
+
+    18.2.1.3 Runtime Semantics: EvalDeclarationInstantiation
+
+    [...]
+    5. If strict is false, then
+       [...]
+       b. Let thisLex be lexEnv.
+       c. Assert: The following loop will terminate.
+       d. Repeat while thisLex is not the same as varEnv,
+          i. Let thisEnvRec be thisLex's EnvironmentRecord.
+          ii. If thisEnvRec is not an object Environment Record, then
+              1. NOTE: The environment of with statements cannot contain any
+                 lexical declaration so it doesn't need to be checked for
+                 var/let hoisting conflicts.
+              2. For each name in varNames, do
+                 a. If thisEnvRec.HasBinding(name) is true, then
+                    i. Throw a SyntaxError exception.
+                    ii. NOTE: Annex B.3.5 defines alternate semantics for the
+                        above step.
+                 b. NOTE: A direct eval will not hoist var declaration over a
+                    like-named lexical declaration.
+          iii. Let thisLex be thisLex's outer environment reference.
+flags: [noStrict]
+features: [let]
+---*/
+
+assert.throws(SyntaxError, function() {
+  let x;
+  eval('var x;');
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/scope-name-var-close.js b/js/src/tests/test262/language/expressions/function/scope-name-var-close.js
new file mode 100644
index 0000000000..2114f5ad5c
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/scope-name-var-close.js
@@ -0,0 +1,30 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-function-definitions-runtime-semantics-evaluation
+description: Removal of variable environment for the BindingIdentifier
+info: |
+    [...]
+    2. Let scope be the running execution context's LexicalEnvironment.
+    3. Let funcEnv be NewDeclarativeEnvironment(scope).
+    4. Let envRec be funcEnv's EnvironmentRecord.
+    5. Let name be StringValue of BindingIdentifier.
+    6. Perform envRec.CreateImmutableBinding(name, false).
+    7. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+       funcEnv, strict).
+    [...]
+---*/
+
+var probe;
+
+var func = function f() {
+  probe = function() { return f; };
+};
+var f = 'outside';
+
+func();
+
+assert.sameValue(f, 'outside');
+assert.sameValue(probe(), func);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/scope-name-var-open-non-strict.js b/js/src/tests/test262/language/expressions/function/scope-name-var-open-non-strict.js
new file mode 100644
index 0000000000..4d52ee06c5
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/scope-name-var-open-non-strict.js
@@ -0,0 +1,52 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-function-definitions-runtime-semantics-evaluation
+description: >
+    Creation of new variable environment for the BindingIdentifier
+    parameter
+info: |
+    [...]
+    2. Let scope be the running execution context's LexicalEnvironment.
+    3. Let funcEnv be NewDeclarativeEnvironment(scope).
+    4. Let envRec be funcEnv's EnvironmentRecord.
+    5. Let name be StringValue of BindingIdentifier.
+    6. Perform envRec.CreateImmutableBinding(name, false).
+    7. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+       funcEnv, strict).
+    [...]
+flags: [noStrict]
+---*/
+
+var f = 'outside';
+var probeBefore = function() { return f; };
+var setBefore = function() { f = null; };
+var probeParams, setParams, probeBody, setBody;
+
+var func = function f(
+  _ = (
+    probeParams = function() { return f; },
+    setParams = function() { f = null; }
+    )
+  ) {
+  probeBody = function() { return f; };
+  setBody = function() { f = null; };
+};
+
+func();
+
+assert.sameValue(probeBefore(), 'outside');
+setBefore();
+assert.sameValue(probeBefore(), null);
+
+assert.sameValue(probeParams(), func, 'inner binding value (from parameters)');
+setParams();
+assert.sameValue(
+  probeParams(), func, 'inner binding is immutable (from parameters)'
+);
+
+assert.sameValue(probeBody(), func, 'inner binding value (from body)');
+setBody();
+assert.sameValue(probeBody(), func, 'inner binding is immutable (from body)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/scope-name-var-open-strict-strict.js b/js/src/tests/test262/language/expressions/function/scope-name-var-open-strict-strict.js
new file mode 100644
index 0000000000..e1afa2fab6
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/scope-name-var-open-strict-strict.js
@@ -0,0 +1,57 @@
+'use strict';
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-function-definitions-runtime-semantics-evaluation
+description: >
+    Creation of new variable environment for the BindingIdentifier
+    parameter
+info: |
+    [...]
+    2. Let scope be the running execution context's LexicalEnvironment.
+    3. Let funcEnv be NewDeclarativeEnvironment(scope).
+    4. Let envRec be funcEnv's EnvironmentRecord.
+    5. Let name be StringValue of BindingIdentifier.
+    6. Perform envRec.CreateImmutableBinding(name, false).
+    7. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+       funcEnv, strict).
+    [...]
+flags: [onlyStrict]
+---*/
+
+var f = 'outside';
+var probeBefore = function() { return f; };
+var setBefore = function() { f = null; };
+var probeParams, setParams, probeBody, setBody;
+
+var func = function f(
+  _ = (
+    probeParams = function() { return f; },
+    setParams = function() { f = null; }
+    )
+  ) {
+  probeBody = function() { return f; };
+  setBody = function() { f = null; };
+};
+
+func();
+
+assert.sameValue(probeBefore(), 'outside');
+setBefore();
+assert.sameValue(probeBefore(), null);
+
+assert.sameValue(probeParams(), func, 'inner binding value (from parameters)');
+assert.throws(
+  TypeError, setParams, 'inner binding rejects modification (from parameters)'
+);
+assert.sameValue(
+  probeParams(), func, 'inner binding is immutable (from parameters)'
+);
+
+assert.sameValue(probeBody(), func, 'inner binding value (from body)');
+assert.throws(
+  TypeError, setBody, 'inner binding rejects modification (from body)'
+);
+assert.sameValue(probeBody(), func, 'inner binding is immutable (from body)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/scope-param-elem-var-close.js b/js/src/tests/test262/language/expressions/function/scope-param-elem-var-close.js
new file mode 100644
index 0000000000..4ed7ddbdba
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/scope-param-elem-var-close.js
@@ -0,0 +1,32 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-functiondeclarationinstantiation
+description: >
+    sloppy direct evals in params introduce vars
+info: |
+    [...]
+    20. Else,
+      a. NOTE: A separate Environment Record is needed to ensure that bindings created by direct eval calls in the formal parameter list are outside the environment where parameters are declared.
+      b. Let calleeEnv be the LexicalEnvironment of calleeContext.
+      c. Let env be NewDeclarativeEnvironment(calleeEnv).
+      d. Let envRec be env's EnvironmentRecord.
+    [...]
+flags: [noStrict]
+---*/
+
+var x = 'outside';
+var probe1, probe2, probeBody;
+
+(function(
+    _ = (eval('var x = "inside";'), probe1 = function() { return x; }),
+    __ = probe2 = function() { return x; }
+  ) {
+  probeBody = function() { return x; };
+}());
+
+assert.sameValue(probe1(), 'inside');
+assert.sameValue(probe2(), 'inside');
+assert.sameValue(probeBody(), 'inside');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/scope-param-elem-var-open.js b/js/src/tests/test262/language/expressions/function/scope-param-elem-var-open.js
new file mode 100644
index 0000000000..76953069fc
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/scope-param-elem-var-open.js
@@ -0,0 +1,30 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-functiondeclarationinstantiation
+description: >
+    sloppy direct evals in params introduce vars
+info: |
+    [...]
+    20. Else,
+      a. NOTE: A separate Environment Record is needed to ensure that bindings created by direct eval calls in the formal parameter list are outside the environment where parameters are declared.
+      b. Let calleeEnv be the LexicalEnvironment of calleeContext.
+      c. Let env be NewDeclarativeEnvironment(calleeEnv).
+      d. Let envRec be env's EnvironmentRecord.
+    [...]
+flags: [noStrict]
+---*/
+
+var x = 'outside';
+var probe1, probe2;
+
+(function(
+    _ = probe1 = function() { return x; },
+    __ = (eval('var x = "inside";'), probe2 = function() { return x; })
+  ) {
+}());
+
+assert.sameValue(probe1(), 'inside');
+assert.sameValue(probe2(), 'inside');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/scope-param-rest-elem-var-close.js b/js/src/tests/test262/language/expressions/function/scope-param-rest-elem-var-close.js
new file mode 100644
index 0000000000..a1f583d256
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/scope-param-rest-elem-var-close.js
@@ -0,0 +1,30 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-functiondeclarationinstantiation
+description: >
+    sloppy direct evals in params introduce vars
+info: |
+    [...]
+    20. Else,
+      a. NOTE: A separate Environment Record is needed to ensure that bindings created by direct eval calls in the formal parameter list are outside the environment where parameters are declared.
+      b. Let calleeEnv be the LexicalEnvironment of calleeContext.
+      c. Let env be NewDeclarativeEnvironment(calleeEnv).
+      d. Let envRec be env's EnvironmentRecord.
+    [...]
+flags: [noStrict]
+---*/
+
+var x = 'outside';
+var probeParam, probeBody;
+
+(function(
+    ...[_ = (eval('var x = "inside";'), probeParam = function() { return x; })]
+  ) {
+    probeBody = function() { return x; }
+}());
+
+assert.sameValue(probeParam(), 'inside');
+assert.sameValue(probeBody(), 'inside');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/scope-param-rest-elem-var-open.js b/js/src/tests/test262/language/expressions/function/scope-param-rest-elem-var-open.js
new file mode 100644
index 0000000000..fd636f75e1
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/scope-param-rest-elem-var-open.js
@@ -0,0 +1,30 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-functiondeclarationinstantiation
+description: >
+    sloppy direct evals in params introduce vars
+info: |
+    [...]
+    20. Else,
+      a. NOTE: A separate Environment Record is needed to ensure that bindings created by direct eval calls in the formal parameter list are outside the environment where parameters are declared.
+      b. Let calleeEnv be the LexicalEnvironment of calleeContext.
+      c. Let env be NewDeclarativeEnvironment(calleeEnv).
+      d. Let envRec be env's EnvironmentRecord.
+    [...]
+flags: [noStrict]
+---*/
+
+var x = 'outside';
+var probe1, probe2;
+
+(function(
+    _ = probe1 = function() { return x; },
+    ...[__ = (eval('var x = "inside";'), probe2 = function() { return x; })]
+  ) {
+}());
+
+assert.sameValue(probe1(), 'inside');
+assert.sameValue(probe2(), 'inside');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/scope-paramsbody-var-close.js b/js/src/tests/test262/language/expressions/function/scope-paramsbody-var-close.js
new file mode 100644
index 0000000000..25679c5104
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/scope-paramsbody-var-close.js
@@ -0,0 +1,36 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-functiondeclarationinstantiation
+description: >
+    Removal of variable environment for the function body
+info: |
+    [...]
+    26. If hasParameterExpressions is false, then
+        [...]
+    27. Else,
+        a. NOTE A separate Environment Record is needed to ensure that closures
+           created by expressions in the formal parameter list do not have
+           visibility of declarations in the function body.
+        b. Let varEnv be NewDeclarativeEnvironment(env).
+        c. Let varEnvRec be varEnv's EnvironmentRecord.
+        d. Set the VariableEnvironment of calleeContext to varEnv.
+        e. Let instantiatedVarNames be a new empty List.
+        [...]
+---*/
+
+var probe;
+
+// A parameter expression is necessary to trigger the creation of the scope
+// under test.
+(function(_ = null) {
+  var x = 'inside';
+  probe = function() { return x; };
+}());
+
+var x = 'outside';
+
+assert.sameValue(probe(), 'inside');
+assert.sameValue(x, 'outside');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/scope-paramsbody-var-open.js b/js/src/tests/test262/language/expressions/function/scope-paramsbody-var-open.js
new file mode 100644
index 0000000000..1066cb066b
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/scope-paramsbody-var-open.js
@@ -0,0 +1,34 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-functiondeclarationinstantiation
+description: >
+    Creation of new variable environment for the function body (as distinct from
+    that for the function's parameters)
+info: |
+    [...]
+    26. If hasParameterExpressions is false, then
+        [...]
+    27. Else,
+        a. NOTE A separate Environment Record is needed to ensure that closures
+           created by expressions in the formal parameter list do not have
+           visibility of declarations in the function body.
+        b. Let varEnv be NewDeclarativeEnvironment(env).
+        c. Let varEnvRec be varEnv's EnvironmentRecord.
+        d. Set the VariableEnvironment of calleeContext to varEnv.
+        e. Let instantiatedVarNames be a new empty List.
+        [...]
+---*/
+
+var x = 'outside';
+var probeParams, probeBody;
+
+(function(_ = probeParams = function() { return x; }) {
+  var x = 'inside';
+  probeBody = function() { return x; };
+}());
+
+assert.sameValue(probeParams(), 'outside');
+assert.sameValue(probeBody(), 'inside');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/shell.js b/js/src/tests/test262/language/expressions/function/shell.js
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/shell.js
diff --git a/js/src/tests/test262/language/expressions/function/static-init-await-binding.js b/js/src/tests/test262/language/expressions/function/static-init-await-binding.js
new file mode 100644
index 0000000000..1b0f36d2f9
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/static-init-await-binding.js
@@ -0,0 +1,20 @@
+// Copyright (C) 2021 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-class-definitions-static-semantics-early-errors
+description: The `await` keyword is interpreted as an IdentifierReference within function expressions
+info: |
+  ClassStaticBlockBody : ClassStaticBlockStatementList
+
+  [...]
+  - It is a Syntax Error if ContainsAwait of ClassStaticBlockStatementList is true.
+features: [class-static-block]
+---*/
+
+class C {
+  static {
+    (function await(await) {});
+  }
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/static-init-await-reference.js b/js/src/tests/test262/language/expressions/function/static-init-await-reference.js
new file mode 100644
index 0000000000..d6c2180a06
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/static-init-await-reference.js
@@ -0,0 +1,28 @@
+// Copyright (C) 2021 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-class-definitions-static-semantics-early-errors
+description: The `await` keyword is interpreted as an IdentifierReference within function expressions
+info: |
+  ClassStaticBlockBody : ClassStaticBlockStatementList
+
+  [...]
+  - It is a Syntax Error if ContainsAwait of ClassStaticBlockStatementList is true.
+features: [class-static-block]
+---*/
+
+var await = 0;
+var fromParam, fromBody;
+
+class C {
+  static {
+    (function (x = fromParam = await) {
+      fromBody = await;
+    })();
+  }
+}
+
+assert.sameValue(fromParam, 0, 'from parameter');
+assert.sameValue(fromBody, 0, 'from body');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/unscopables-with-in-nested-fn.js b/js/src/tests/test262/language/expressions/function/unscopables-with-in-nested-fn.js
new file mode 100644
index 0000000000..f98c73226c
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/unscopables-with-in-nested-fn.js
@@ -0,0 +1,104 @@
+// This file was procedurally generated from the following sources:
+// - src/function-forms/unscopables-with-in-nested-fn.case
+// - src/function-forms/default/func-expr.template
+/*---
+description: Symbol.unscopables behavior across scope boundaries (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [globalThis, Symbol.unscopables]
+flags: [generated, noStrict]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    ...
+    Let envRec be lex's EnvironmentRecord.
+    Let exists be ? envRec.HasBinding(name).
+
+    HasBinding
+
+    ...
+    If the withEnvironment flag of envRec is false, return true.
+    Let unscopables be ? Get(bindings, @@unscopables).
+    If Type(unscopables) is Object, then
+       Let blocked be ToBoolean(? Get(unscopables, N)).
+       If blocked is true, return false.
+
+    (The `with` Statement) Runtime Semantics: Evaluation
+
+    ...
+    Set the withEnvironment flag of newEnv’s EnvironmentRecord to true.
+    ...
+
+---*/
+let count = 0;
+var v = 1;
+globalThis[Symbol.unscopables] = {
+  v: true,
+};
+
+{
+  count++;
+
+var callCount = 0;
+// Stores a reference `ref` for case evaluation
+var ref;
+ref = function(x) {
+  (function() {
+    count++;
+    with (globalThis) {
+      count++;
+      assert.sameValue(v, 1, 'The value of `v` is 1');
+    }
+  })();
+  (function() {
+    count++;
+    var v = x;
+    with (globalThis) {
+      count++;
+      assert.sameValue(v, 10, 'The value of `v` is 10');
+      v = 20;
+    }
+    assert.sameValue(v, 20, 'The value of `v` is 20');
+    assert.sameValue(globalThis.v, 1, 'The value of globalThis.v is 1');
+  })();
+  assert.sameValue(v, 1, 'The value of `v` is 1');
+  assert.sameValue(globalThis.v, 1, 'The value of globalThis.v is 1');
+  callCount = callCount + 1;
+};
+
+ref(10);
+
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+  count++;
+}
+assert.sameValue(count, 6, 'The value of `count` is 6');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/unscopables-with.js b/js/src/tests/test262/language/expressions/function/unscopables-with.js
new file mode 100644
index 0000000000..9164981c00
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/unscopables-with.js
@@ -0,0 +1,98 @@
+// This file was procedurally generated from the following sources:
+// - src/function-forms/unscopables-with.case
+// - src/function-forms/default/func-expr.template
+/*---
+description: Symbol.unscopables behavior across scope boundaries (function expression)
+esid: sec-function-definitions-runtime-semantics-evaluation
+features: [globalThis, Symbol.unscopables]
+flags: [generated, noStrict]
+info: |
+    FunctionExpression : function ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    ...
+    Let envRec be lex's EnvironmentRecord.
+    Let exists be ? envRec.HasBinding(name).
+
+    HasBinding
+
+    ...
+    If the withEnvironment flag of envRec is false, return true.
+    Let unscopables be ? Get(bindings, @@unscopables).
+    If Type(unscopables) is Object, then
+       Let blocked be ToBoolean(? Get(unscopables, N)).
+       If blocked is true, return false.
+
+    (The `with` Statement) Runtime Semantics: Evaluation
+
+    ...
+    Set the withEnvironment flag of newEnv’s EnvironmentRecord to true.
+    ...
+
+---*/
+let count = 0;
+var v = 1;
+globalThis[Symbol.unscopables] = {
+  v: true,
+};
+
+{
+  count++;
+
+var callCount = 0;
+// Stores a reference `ref` for case evaluation
+var ref;
+ref = function(x) {
+  count++;
+  with (globalThis) {
+    count++;
+    assert.sameValue(v, undefined, 'The value of `v` is expected to equal `undefined`');
+  }
+  count++;
+  var v = x;
+  with (globalThis) {
+    count++;
+    assert.sameValue(v, 10, 'The value of `v` is 10');
+    v = 20;
+  }
+  assert.sameValue(v, 20, 'The value of `v` is 20');
+  assert.sameValue(globalThis.v, 1, 'The value of globalThis.v is 1');
+  callCount = callCount + 1;
+};
+
+ref(10);
+
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+  count++;
+}
+assert.sameValue(count, 6, 'The value of `count` is 6');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/function/use-strict-with-non-simple-param.js b/js/src/tests/test262/language/expressions/function/use-strict-with-non-simple-param.js
new file mode 100644
index 0000000000..5b22d8500f
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/function/use-strict-with-non-simple-param.js
@@ -0,0 +1,22 @@
+// |reftest| error:SyntaxError
+// Copyright (C) 2015 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-function-definitions-static-semantics-early-errors
+description: >
+  A SyntaxError is thrown if a function contains a non-simple parameter list and a UseStrict directive.
+info: |
+  Static Semantics: Early Errors
+
+  It is a Syntax Error if ContainsUseStrict of FunctionBody is true and IsSimpleParameterList of FormalParameters is false.
+negative:
+  phase: parse
+  type: SyntaxError
+---*/
+
+$DONOTEVALUATE();
+
+var f = function(a = 0) {
+  "use strict";
+}