| // 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. |
| |
| (function testMegamorphicWithDontEnumTransition() { |
| function spread(o) { return { ...o }; } |
| |
| // Set up transition tree |
| let obj = { ...{}, a: 0, b: 1, c: 2, }; |
| Object.defineProperty(obj, "boom", { enumerable: false, configurable: true, |
| writable: true }); |
| |
| // make CloneObjectIC MEGAMORPHIC |
| spread(new Proxy({}, {})); |
| |
| // Ensure we don't crash, and create the correct object |
| let result = spread({ a: 0, b: 1, c: 2, boom: 3 }); |
| |
| assertEquals({ a: 0, b: 1, c: 2, boom: 3 }, result); |
| assertEquals({ |
| enumerable: true, |
| writable: true, |
| configurable: true, |
| value: 3, |
| }, Object.getOwnPropertyDescriptor(result, "boom")); |
| })(); |
