1 files changed, 60 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/statements/generators/rest-params-trailing-comma-early-error.js b/js/src/tests/test262/language/statements/generators/rest-params-trailing-comma-early-error.js
new file mode 100644
index 0000000000..60f52da105
--- /dev/null
+++ b/js/src/tests/test262/language/statements/generators/rest-params-trailing-comma-early-error.js
@@ -0,0 +1,60 @@
+// |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/gen-func-decl.template
+/*---
+description: It's a syntax error if a FunctionRestParameter is followed by a trailing comma (generator function declaration)
+esid: sec-generator-function-definitions-runtime-semantics-instantiatefunctionobject
+features: [generators]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    GeneratorDeclaration : function * ( FormalParameters ) { GeneratorBody }
+
+        [...]
+        2. Let F be GeneratorFunctionCreate(Normal, FormalParameters,
+           GeneratorBody, 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();
+
+function* f(...a,) {
+  
+}