The Tor Browser / file revision

 // Any copyright is dedicated to the Public Domain.

 // http://creativecommons.org/licenses/publicdomain/

 //-----------------------------------------------------------------------------

 var BUGNUMBER = 548671;

 var summary =

   "Don't use a shared-permanent inherited property to implement " +

   "[].length or (function(){}).length";

 print(BUGNUMBER + ": " + summary);

 /**************

  * BEGIN TEST *

  **************/

 var a = [];

 a.p = 1;

 var x = Object.create(a);

 assertEq(x.length, 0);

 assertEq(x.p, 1);

 assertEq(a.length, 0);

 if (typeof reportCompare === "function")

   reportCompare(true, true);

 print("All tests passed!");