1 files changed, 36 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/statements/async-function/rest-params-trailing-comma-early-error.js b/js/src/tests/test262/language/statements/async-function/rest-params-trailing-comma-early-error.js
new file mode 100644
index 0000000000..a4e5b59135
--- /dev/null
+++ b/js/src/tests/test262/language/statements/async-function/rest-params-trailing-comma-early-error.js
@@ -0,0 +1,36 @@
+// |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/async-func-decl.template
+/*---
+description: It's a syntax error if a FunctionRestParameter is followed by a trailing comma (async function declaration)
+esid: sec-async-function-definitions
+features: [async-functions]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    14.6 Async Function Definitions
+
+    AsyncFunctionDeclaration :
+      async function BindingIdentifier ( FormalParameters ) { AsyncFunctionBody }
+
+
+    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();
+
+
+async function f(...a,) {
+  
+}