| // Copyright 2016 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. |
| |
| // In ES#sec-array.prototype.concat |
| // When concat makes a new integer-indexed exotic object, the resulting properties |
| // are non-configurable and cannot have CreateDataPropertyOrThrow called on them, |
| // so it throws a TypeError on failure to make a new property. |
| |
| __v_0 = new Uint8Array(100); |
| array = new Array(10); |
| array.__proto__ = __v_0; |
| assertThrows(() => Array.prototype.concat.call(array), TypeError); |
