The Tor Browser / file revision

 /*

  * Debugger.Source.prototype.text should return a string. Moreover, it

  * should be the same string for each child script sharing that

  * Debugger.Source.

  */

 let g = newGlobal();

 let dbg = new Debugger(g);

 var count = 0;

 dbg.onNewScript = function (script) {

     var text = script.source.text;

     assertEq(typeof text, "string");

     function traverse(script) {

         ++count;

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

             assertEq(script.source.text, text);

             traverse(script);

         });

     };

     traverse(script);

 }

 g.eval("2 * 3");

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

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

 assertEq(count, 6);