The Tor Browser / file revision

 // Any copyright is dedicated to the Public Domain.

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

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

 var BUGNUMBER = 580200;

 var summary =

   'Assertion failure enumerating own properties of proxy returning ' +

   'duplicated own property name';

 print(BUGNUMBER + ": " + summary);

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

  * BEGIN TEST *

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

 var x = Proxy.create({ keys: function() { return ["0","0"]; } }, [1,2]);

 var ax = Object.keys(x);

 assertEq(ax.length, 1, "array: " + ax);

 assertEq(ax[0], "0");

 var p = Proxy.create({ keys: function() { return ["1","1"]; } }, null);

 var ap = Object.keys(p);

 assertEq(ap.length, 1, "array: " + ap);

 assertEq(ap[0], "1");

 var x = Proxy.create({ getOwnPropertyNames: function() { return ["0","0"]; } }, [1,2]);

 var ax = Object.getOwnPropertyNames(x);

 assertEq(ax.length, 1, "array: " + ax);

 assertEq(ax[0], "0");

 var p = Proxy.create({ getOwnPropertyNames: function() { return ["1","1"]; } }, null);

 var ap = Object.getOwnPropertyNames(p);

 assertEq(ap.length, 1, "array: " + ap);

 assertEq(ap[0], "1");

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

 if (typeof reportCompare === "function")

   reportCompare(true, true);

 print("All tests passed!");