| // Copyright 2017 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 |
| var array = [1.7, 1.7, 1.7]; |
| var mutator = { |
| [Symbol.toPrimitive]() { |
| Object.defineProperties( |
| array, {0: {get() {}}, 1: {get() {}}, 2: {get() {}}}); |
| |
| return 0; |
| } |
| }; |
| |
| assertTrue(array.includes(undefined, mutator)); |
| |
| function search(array, searchElement, startIndex) { |
| return array.includes(searchElement, startIndex); |
| }; |
| %PrepareFunctionForOptimization(search); |
| array = [1.7, 1.7, 1.7]; |
| var not_mutator = { |
| [Symbol.toPrimitive]() { |
| return 0; |
| } |
| }; |
| assertFalse(search(array, undefined, not_mutator)); |
| assertFalse(search(array, undefined, not_mutator)); |
| %OptimizeFunctionOnNextCall(search); |
| assertTrue(search(array, undefined, mutator)); |