The Tor Browser / file revision

 /*

  * Script.prototype.source should be an object. Moreover, it should be the

  * same object for each child script within the same debugger.

  */

 let g = newGlobal();

 let dbg = new Debugger(g);

 let count = 0;

 dbg.onNewScript = function (script) {

     assertEq(typeof script.source, "object");

     function traverse(script) {

         ++count;

         script.getChildScripts().forEach(function (child) {

             assertEq(child.source, script.source);

             traverse(child);

         });

     }

     traverse(script);

 }

 g.eval("2 * 3");

 g.eval("function f() {}");

 g.eval("function f() { function g() {} }");

 g.eval("eval('2 * 3')");

 g.eval("new Function('2 * 3')");

 assertEq(count, 10);