tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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var-env-var-init-local-new-delete.js (1068B)

      1 // Copyright (C) 2016 the V8 project authors. All rights reserved.
      2 // This code is governed by the BSD license found in the LICENSE file.
      3 /*---
      4 esid: sec-evaldeclarationinstantiation
      5 description: Newly-created local binding may be deleted
      6 info: |
      7    [...]
      8    16. For each String vn in declaredVarNames, in list order do
      9        a. If varEnvRec is a global Environment Record, then
     10           [...]
     11        b. Else,
     12           i. Let bindingExists be varEnvRec.HasBinding(vn).
     13           ii. If bindingExists is false, then
     14               1. Let status be ! varEnvRec.CreateMutableBinding(vn, true).
     15               2. Assert: status is not an abrupt completion because of
     16                  validation preceding step 12.
     17               3. Perform ! varEnvRec.InitializeBinding(vn, undefined).
     18    [...]
     19 flags: [noStrict]
     20 ---*/
     21 
     22 var initial = null;
     23 var postDeletion;
     24 
     25 (function() {
     26  eval('initial = x; delete x; postDeletion = function() { x; }; var x;');
     27 }());
     28 
     29 assert.sameValue(initial, undefined);
     30 assert.throws(ReferenceError, postDeletion);
     31 
     32 reportCompare(0, 0);