1 files changed, 78 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/statements/for/dstr/let-obj-ptrn-prop-id-init-skipped.js b/js/src/tests/test262/language/statements/for/dstr/let-obj-ptrn-prop-id-init-skipped.js
new file mode 100644
index 0000000000..5225a15d39
--- /dev/null
+++ b/js/src/tests/test262/language/statements/for/dstr/let-obj-ptrn-prop-id-init-skipped.js
@@ -0,0 +1,78 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/obj-ptrn-prop-id-init-skipped.case
+// - src/dstr-binding/default/for-let.template
+/*---
+description: Destructuring initializer is not evaluated when value is not `undefined` (for statement)
+esid: sec-for-statement-runtime-semantics-labelledevaluation
+features: [destructuring-binding]
+flags: [generated]
+info: |
+    IterationStatement :
+        for ( LexicalDeclaration Expressionopt ; Expressionopt ) Statement
+
+    [...]
+    7. Let forDcl be the result of evaluating LexicalDeclaration.
+    [...]
+
+    LexicalDeclaration : LetOrConst BindingList ;
+
+    1. Let next be the result of evaluating BindingList.
+    2. ReturnIfAbrupt(next).
+    3. Return NormalCompletion(empty).
+
+    BindingList : BindingList , LexicalBinding
+
+    1. Let next be the result of evaluating BindingList.
+    2. ReturnIfAbrupt(next).
+    3. Return the result of evaluating LexicalBinding.
+
+    LexicalBinding : BindingPattern Initializer
+
+    1. Let rhs be the result of evaluating Initializer.
+    2. Let value be GetValue(rhs).
+    3. ReturnIfAbrupt(value).
+    4. Let env be the running execution context’s LexicalEnvironment.
+    5. Return the result of performing BindingInitialization for BindingPattern
+       using value and env as the 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 iterCount = 0;
+
+for (let { s: t = counter(), u: v = counter(), w: x = counter(), y: z = counter() } = { s: null, u: 0, w: false, y: '' }; iterCount < 1; ) {
+  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;
+  });
+
+  iterCount += 1;
+}
+
+assert.sameValue(iterCount, 1, 'Iteration occurred as expected');
+
+reportCompare(0, 0);