The Tor Browser / file revision

 // Any copyright is dedicated to the Public Domain.

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

 "use strict"

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

 var BUGNUMBER = 649570;

 var summary = "|delete window.NaN| should throw a TypeError";

 print(BUGNUMBER + ": " + summary);

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

  * BEGIN TEST *

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

 var g = this, v = false;

 try

 {

   delete this.NaN;

   throw new Error("no exception thrown");

 }

 catch (e)

 {

   assertEq(e instanceof TypeError, true,

            "Expected a TypeError, got: " + e);

 }

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

 if (typeof reportCompare === "function")

   reportCompare(true, true);

 print("Tests complete");