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// |reftest| error:SyntaxError
// Copyright 2016 Microsoft, Inc. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
author: Brian Terlson <brian.terlson@microsoft.com>
esid: sec-async-function-definitions
description: Formal parameters may not contain duplicates
info: |
# 14.7 Arrow Function Definitions
AsyncMethod[Yield, Await]:
async[no LineTerminator here]PropertyName[?Yield, ?Await](UniqueFormalParameters[~Yield, +Await]){AsyncFunctionBody}
# 14.1.2 Static Semantics: Early Errors
UniqueFormalParameters:FormalParameters
- It is a Syntax Error if BoundNames of FormalParameters contains any
duplicate elements.
negative:
phase: parse
type: SyntaxError
---*/
$DONOTEVALUATE();
class Foo {
async foo(a, a) { }
}