| // Copyright 2018 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. |
| |
| // Flags: --allow-natives-syntax |
| |
| |
| (function TestPrototypeProxy() { |
| const backup = Array.prototype.__proto__; |
| Array.prototype.__proto__ = new Proxy({}, {set() {throw 666}}); |
| |
| function f() { |
| return ['a', ...['b', 'c', 'd'], 'e'] |
| } |
| |
| %PrepareFunctionForOptimization(f); |
| assertArrayEquals(['a', 'b', 'c', 'd', 'e'], f()); |
| %OptimizeFunctionOnNextCall(f); |
| assertArrayEquals(['a', 'b', 'c', 'd', 'e'], f()); |
| |
| Object.setPrototypeOf(Array.prototype, backup); |
| })(); |