src/dstr-binding/ary-ptrn-elem-id-iter-val-err.case

// Copyright (C) 2016 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
desc: Error forwarding when IteratorValue returns an abrupt completion
template: error
info: |
    13.3.3.6 Runtime Semantics: IteratorBindingInitialization

    SingleNameBinding : BindingIdentifier Initializeropt

    [...]
    4. If iteratorRecord.[[done]] is false, then
       a. Let next be IteratorStep(iteratorRecord.[[iterator]]).
       b. If next is an abrupt completion, set iteratorRecord.[[done]] to true.
       c. ReturnIfAbrupt(next).
       d. If next is false, set iteratorRecord.[[done]] to true.
       e. Else,
          i. Let v be IteratorValue(next).
          ii. If v is an abrupt completion, set iteratorRecord.[[done]] to
              true.
          iii. ReturnIfAbrupt(v).
features: [Symbol.iterator]
---*/

//- setup
var poisonedValue = Object.defineProperty({}, 'value', {
  get: function() {
    throw new Test262Error();
  }
});
var g = {};
g[Symbol.iterator] = function() {
  return {
    next: function() {
      return poisonedValue;
    }
  };
};
//- elems
[x]
//- vals
g
//- error
Test262Error