tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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regress-146596.js (2470B)

      1 /* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
      2 /* This Source Code Form is subject to the terms of the Mozilla Public
      3 * License, v. 2.0. If a copy of the MPL was not distributed with this
      4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      5 
      6 /*
      7 *
      8 * Date:    18 Jun 2002
      9 * SUMMARY: Shouldn't crash when catch parameter is "hidden" by varX
     10 * See http://bugzilla.mozilla.org/show_bug.cgi?id=146596
     11 *
     12 */
     13 //-----------------------------------------------------------------------------
     14 var UBound = 0;
     15 var BUGNUMBER = 146596;
     16 var summary = "Shouldn't crash when catch parameter is 'hidden' by varX";
     17 var status = '';
     18 var statusitems = [];
     19 var actual = '';
     20 var actualvalues = [];
     21 var expect= '';
     22 var expectedvalues = [];
     23 
     24 
     25 /*
     26 * Just seeing we don't crash when executing this function -
     27 * This example provided by jim-patterson@ncf.ca
     28 *
     29 * Brendan: "Jim, thanks for the testcase. But note that |var|
     30 * in a JS function makes a function-scoped variable --  JS lacks
     31 * block scope apart from for catch variables within catch blocks.
     32 *
     33 * Therefore the catch variable hides the function-local variable."
     34 */
     35 function F()
     36 {
     37  try
     38  {
     39    return "A simple exception";
     40  }
     41  catch(e)
     42  {
     43    var e = "Another exception";
     44  }
     45 
     46  return 'XYZ';
     47 }
     48 
     49 status = inSection(1);
     50 actual = F();
     51 expect = "A simple exception";
     52 addThis();
     53 
     54 
     55 
     56 /*
     57 * Sanity check by Brendan: "This should output
     58 *
     59 *             24
     60 *             42
     61 *          undefined
     62 *
     63 * and throw no uncaught exception."
     64 *
     65 */
     66 function f(obj)
     67 {
     68  var res = [];
     69 
     70  try
     71  {
     72    throw 42;
     73  }
     74  catch(e)
     75  {
     76    with(obj)
     77    {
     78      var e;
     79      res[0] = e; // |with| binds tighter than |catch|; s/b |obj.e|
     80    }
     81 
     82    res[1] = e;   // |catch| binds tighter than function scope; s/b 42
     83  }
     84 
     85  res[2] = e;     // |var e| has function scope; s/b visible but contain |undefined|
     86  return res;
     87 }
     88 
     89 status = inSection(2);
     90 actual = f({e:24});
     91 expect = [24, 42, undefined];
     92 addThis();
     93 
     94 
     95 
     96 
     97 //-----------------------------------------------------------------------------
     98 test();
     99 //-----------------------------------------------------------------------------
    100 
    101 
    102 
    103 function addThis()
    104 {
    105  statusitems[UBound] = status;
    106  actualvalues[UBound] = actual.toString();
    107  expectedvalues[UBound] = expect.toString();
    108  UBound++;
    109 }
    110 
    111 
    112 function test()
    113 {
    114  printBugNumber(BUGNUMBER);
    115  printStatus(summary);
    116 
    117  for (var i=0; i<UBound; i++)
    118  {
    119    reportCompare(expectedvalues[i], actualvalues[i], statusitems[i]);
    120  }
    121 }