| // 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 | |
| // Create a double elements array. | |
| const iterable = [123.123]; | |
| assertTrue(%HasDoubleElements(iterable)) | |
| iterable.length = 0; | |
| assertTrue(%HasDoubleElements(iterable)) | |
| // Should not throw here. | |
| let map = new Map(iterable); | |
| assertEquals(0, map.size); | |
| new WeakMap(iterable); // WeakMap does not have a size |