tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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iterator-not-closed-for-uncallable-next.js (1115B)

      1 // Copyright (C) 2018 Kevin Gibbons. All rights reserved.
      2 // This code is governed by the BSD license found in the LICENSE file.
      3 
      4 /*---
      5 esid: sec-object.fromentries
      6 description: Does not close iterators with an uncallable `next` property.
      7 info: |
      8  Object.fromEntries ( iterable )
      9 
     10  ...
     11  4. Let stepsDefine be the algorithm steps defined in CreateDataPropertyOnObject Functions.
     12  5. Let adder be CreateBuiltinFunction(stepsDefine, « »).
     13  6. Return ? AddEntriesFromIterable(obj, iterable, adder).
     14 
     15  AddEntriesFromIterable ( target, iterable, adder )
     16 
     17  ...
     18  4. Repeat,
     19    a. Let next be ? IteratorStep(iteratorRecord).
     20 
     21 
     22  IteratorStep ( iteratorRecord )
     23 
     24  1. Let result be ? IteratorNext(iteratorRecord).
     25 features: [Symbol.iterator, Object.fromEntries]
     26 ---*/
     27 
     28 var iterable = {
     29  [Symbol.iterator]: function() {
     30    return {
     31      next: null,
     32      return: function() {
     33        throw new Test262Error('should not call return');
     34      },
     35    };
     36  },
     37 };
     38 
     39 assert.sameValue(typeof Object.fromEntries, 'function');
     40 assert.throws(TypeError, function() {
     41  Object.fromEntries(iterable);
     42 });
     43 
     44 reportCompare(0, 0);