// Copyright (C) 2016 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
desc: >
    IteratorClose is called when AssignmentRestEvaluation produces a "throw"
    completion due to reference evaluation
info: |
    ArrayAssignmentPattern :
        [ AssignmentElementList , Elisionopt AssignmentRestElementopt ]

    [...]
    7. If AssignmentRestElement is present, then
       a. Let status be the result of performing
          IteratorDestructuringAssignmentEvaluation of AssignmentRestElement
          with iteratorRecord as the argument.
    8. If iteratorRecord.[[done]] is false, return IteratorClose(iterator,
       status).
    9. Return Completion(status).

    7.4.6 IteratorClose( iterator, completion )

    [...]
    7. If completion.[[type]] is throw, return Completion(completion)
features: [Symbol.iterator]
template: error
es6id: 12.14.5.2
esid: sec-runtime-semantics-destructuringassignmentevaluation
---*/

//- setup
var nextCount = 0;
var returnCount = 0;
var x;
function ReturnError() {}
var iterable = {};
var iterator = {
  next: function() {
    nextCount += 1;
    // Set an upper-bound to limit unnecessary iteration in non-conformant
    // implementations
    return { done: nextCount > 10 };
  },
  return: function() {
    returnCount += 1;

    // This value should be discarded.
    throw new ReturnError();
  }
};
var thrower = function() {
  throw new Test262Error();
};
iterable[Symbol.iterator] = function() {
  return iterator;
};
//- error
Test262Error
//- elems
[ x , ...{}[thrower()] ]
//- vals
iterable
//- teardown
assert.sameValue(nextCount, 1);
assert.sameValue(returnCount, 1);