The Tor Browser / file revision

 // Copyright 2009 the Sputnik authors.  All rights reserved.

 // This code is governed by the BSD license found in the LICENSE file.

 /**

  * Variable instantiation is performed using the global object as

  * the variable object and using property attributes { DontDelete }

  *

  * @path ch10/10.4/10.4.1/S10.4.1_A1_T1.js

  * @description Checking if deleting variable x, that is defined as var x = 1, fails

  * @noStrict

  */

 var x = 1;

 if (this.x !== 1) {

   $ERROR("#1: variable x is a property of global object");

 }

 if(delete this.x !== false){

   $ERROR("#2: variable x has property attribute DontDelete");

 }