JSTests/test262/test/built-ins/Array/prototype/copyWithin/return-abrupt-from-get-start-value.js

// Copyright (C) 2015 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-array.prototype.copywithin
description: >
  Return abrupt from getting property value - Get(O, fromKey).
info: |
  22.1.3.3 Array.prototype.copyWithin (target, start [ , end ] )

  ...
  8. Let relativeStart be ToInteger(start).
  9. ReturnIfAbrupt(relativeStart).
  10. If relativeStart < 0, let from be max((len + relativeStart),0); else let
  from be min(relativeStart, len).
  ...
  17. Repeat, while count > 0
    a. Let fromKey be ToString(from).
    b. Let toKey be ToString(to).
    c. Let fromPresent be HasProperty(O, fromKey).
    d. ReturnIfAbrupt(fromPresent).
    e. If fromPresent is true, then
      i. Let fromVal be Get(O, fromKey).
      ii. ReturnIfAbrupt(fromVal).
  ...
---*/

var o = {
  length: 1
};

Object.defineProperty(o, '0', {
  get: function() {
    throw new Test262Error();
  }
});

assert.throws(Test262Error, function() {
  Array.prototype.copyWithin.call(o, 0, 0);
});