v8/test/mjsunit/regress/regress-crbug-820312.js
Benedikt Meurer fd29e1d841 [builtins] Properly handle DICTIONARY_ELEMENTS in Promise.all closures.
Bug: chromium:820312
Change-Id: Ie9237a5c53ac7121e469af460a2f0ad5016d9d03
Reviewed-on: https://chromium-review.googlesource.com/957090
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51844}
2018-03-09 14:25:34 +00:00

27 lines
858 B
JavaScript

// 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
let arr = new Array(0x10000);
let resolve_element_closures = new Array(0x10000);
for (let i = 0; i < arr.length; i++) {
arr[i] = new Promise(() => {});
arr[i].then = ((idx, resolve) => {
resolve_element_closures[idx] = resolve;
}).bind(null, i);
}
Promise.all(arr);
// 0xffff is too large, transitions to DICTIONARY_ELEMENTS
resolve_element_closures[0xffff]();
// grows the capacity, the elements kind of the result array is still DICTIONARY_ELEMENTS, but the elements object of it is no more a dictionary.
resolve_element_closures[100]();
// You can observe that V8 crashes here in debug mode.
resolve_element_closures[0xfffe]();