src/third_party/mozjs-45/js/src/tests/js1_5/Regress/regress-280769-4.js

/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

//-----------------------------------------------------------------------------
var BUGNUMBER = 280769;
var summary = 'Do not overflow 64K length of char sequence in RegExp []';
var actual = 'No Crash';
var expect = 'No Crash';

printBugNumber(BUGNUMBER);
printStatus (summary);


var N = 20 * 1000; // It should be that N*6  > 64K and N < 32K

var prefixes = ["000", "00", "0"];

function to_4_hex(i)
{
  var printed = i.toString(16);
  if (printed.length < 4) {
    printed= prefixes[printed.length - 1]+printed;
  }
  return printed;

}

var a = new Array(N);
for (var i = 0; i != N; ++i) {
  a[i] = to_4_hex(2*i);
}

var str = '[\\u'+a.join('\\u')+']';
// str is [\u0000\u0002\u0004...\u<printed value of 2N>]

var re = new RegExp(str);

var string_to_match = String.fromCharCode(2 * (N - 1));

var value = re.exec(string_to_match);

var expect =  string_to_match;
var actual = value ? value[0] : value;

reportCompare(expect, actual, summary);