JSTests/test262/test/built-ins/Array/prototype/concat/create-species-non-ctor.js

// Copyright (C) 2016 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
es6id: 22.1.3.1
esid: sec-array.prototype.concat
description: >
    Behavior when the @@species attribute is a non-constructor object
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).
       b. If C is null, let C be undefined.
    [...]
    9. If IsConstructor(C) is false, throw a TypeError exception.
features: [Symbol.species]
---*/

var a = [];

a.constructor = {};
a.constructor[Symbol.species] = parseInt;

assert.throws(TypeError, function() {
  a.concat();
});