The Tor Browser / file revision

 /*

  * Any copyright is dedicated to the Public Domain.

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

  * Contributors:

  *   Gary Kwong

  *   Jeff Walden

  *   Jason Orendorff

  */

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

 var BUGNUMBER = 713944;

 var summary =

   "Don't assert anything about a shape from the property cache until it's " +

   "known the cache entry matches";

 print(BUGNUMBER + ": " + summary);

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

  * BEGIN TEST *

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

 var accDesc = { set: function() {} };

 var dataDesc = { value: 3 };

 function f()

 {

   propertyIsEnumerable = {};

 }

 function g()

 {

   propertyIsEnumerable = {};

 }

 Object.defineProperty(Object.prototype, "propertyIsEnumerable", accDesc);

 f();

 Object.defineProperty(Object.prototype, "propertyIsEnumerable", dataDesc);

 assertEq(propertyIsEnumerable, 3);

 f();

 assertEq(propertyIsEnumerable, 3);

 g();

 assertEq(propertyIsEnumerable, 3);

 var a = { p1: 1, p2: 2 };

 var b = Object.create(a);

 Object.defineProperty(a, "p1", {set: function () {}});

 for (var i = 0; i < 2; i++)

 {

   b.p1 = {};

   Object.defineProperty(a, "p1", {value: 3});

 }

 assertEq(b.p1, 3);

 assertEq(a.p1, 3);

 reportCompare(true, true);