js/src/tests/test262/built-ins/Array/prototype/concat/create-species-poisoned.js


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// Copyright (C) 2016 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-array.prototype.concat
description: Abrupt completion from `@@species` property access
info: |
    1. Let O be ? ToObject(this value).
    2. Let A be ? ArraySpeciesCreate(O, 0).

    9.4.2.3 ArraySpeciesCreate

    [...]
    5. Let C be ? Get(originalArray, "constructor").
    [...]
    7. If Type(C) is Object, then
       a. Let C be ? Get(C, @@species).
features: [Symbol.species]
---*/

var a = [];
a.constructor = {};

Object.defineProperty(a.constructor, Symbol.species, {
  get: function() {
    throw new Test262Error();
  }
});

assert.throws(Test262Error, function() {
  a.concat();
}, 'a.concat() throws a Test262Error exception');

reportCompare(0, 0);