The Tor Browser / file revision

 /*

  * Any copyright is dedicated to the Public Domain.

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

  */

 function strictThis() { 'use strict'; return this; }

 /* Check that calls of flat closure slots get the right |this|. */

 function flat(g) {

     function h() { return g(); }

     return h;

 }

 assertEq(flat(strictThis)(), undefined);

 /* Check that calls up upvars get the right |this|. */

 function upvar(f) {

     function h() {

         return f(); 

     }

     return h();

 }

 assertEq(upvar(strictThis), undefined);

 /* Check that calls to with-object properties get an appropriate 'this'. */

 var obj = { f: strictThis };

 with (obj) {

     /* 

      * The method won't compile anything containing a 'with', but it can

      * compile 'g'.

      */

     function g() { return f(); }

     assertEq(g(), obj);

 }

 reportCompare(true, true);