tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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lex-env-no-init-let.js (854B)

      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-performeval
      5 description: >
      6    Direct eval code creates `let` bindings prior to evaluation but does not
      7    initialize them.
      8 info: |
      9    [...]
     10    14. For each element d in lexDeclarations do
     11        a. NOTE Lexically declared names are only instantiated here but not
     12           initialized.
     13        b. For each element dn of the BoundNames of d do
     14           i. If IsConstantDeclaration of d is true, then
     15              1. Perform ? lexEnvRec.CreateImmutableBinding(dn, true).
     16           ii. Else,
     17               2. Perform ? lexEnvRec.CreateMutableBinding(dn, false).
     18    [...]
     19 features: [let]
     20 ---*/
     21 
     22 assert.throws(ReferenceError, function() {
     23  eval('typeof x; let x;');
     24 });
     25 
     26 reportCompare(0, 0);