// Copyright 2015 the V8 project authors. All rights reserved.// Use of this source code is governed by a BSD-style license that can be// found in the LICENSE file.assertThrows("()=>{}()",SyntaxError);assertThrows("x=>{}()",SyntaxError);assertThrows("(...x)=>{}()",SyntaxError);assertThrows("(x)=>{}()",SyntaxError);assertThrows("(x,y)=>{}()",SyntaxError);assertThrows("(x,y,...z)=>{}()",SyntaxError);