tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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nonconfigurable-descriptors-define-failure.js (1112B)

      1 // Copyright (C) 2020 Alexey Shvayka. All rights reserved.
      2 // This code is governed by the BSD license found in the LICENSE file.
      3 
      4 /*---
      5 esid: sec-arguments-exotic-objects-defineownproperty-p-desc
      6 description: >
      7  OrdinaryDefineOwnProperty returning `false` doesn't leave `arguments` in a
      8  corrupted state, for both mapped and unmapped indices.
      9 info: |
     10  [[DefineOwnProperty]] ( P, Desc )
     11 
     12  [...]
     13  6. Let allowed be ? OrdinaryDefineOwnProperty(args, P, newArgDesc).
     14  7. If allowed is false, return false.
     15 flags: [noStrict]
     16 ---*/
     17 
     18 (function(a) {
     19  Object.defineProperty(arguments, "0", {configurable: false});
     20 
     21  assert.throws(TypeError, () => {
     22    Object.defineProperty(arguments, "0", {configurable: true});
     23  });
     24 
     25  a = 2;
     26  assert.sameValue(arguments[0], 2);
     27 
     28 
     29  Object.defineProperty(arguments, "1", {
     30    get: () => 3,
     31    configurable: false,
     32  });
     33 
     34  assert.throws(TypeError, () => {
     35    Object.defineProperty(arguments, "1", {value: "foo"});
     36  });
     37 
     38  assert.sameValue(arguments[1], 3);
     39  assert.throws(TypeError, () => {
     40    "use strict";
     41    delete arguments[1];
     42  });
     43 })(0);
     44 
     45 reportCompare(0, 0);