The Tor Browser / file revision

 // Test eval-ing names in a topmost script frame

 load(libdir + "asserts.js");

 var g = newGlobal();

 var dbg = new Debugger(g);

 var hits = 0;

 dbg.onDebuggerStatement = function (frame) {

     assertEq(frame.eval("a").return, 2);

     assertEq(frame.eval("c").return, 4);

     var exc = frame.eval("d").throw;

     assertEq(exc instanceof Debugger.Object, true);

     assertEq(exc.proto, frame.eval("ReferenceError.prototype").return);

     hits++;

 };

 g.eval("function f(a, b) { var c = a + b; debugger; eval('debugger;'); }");

 g.eval("f(2, 2);");

 g.eval("var a = 2, b = 2, c = a + b; debugger;");

 assertEq(hits, 3);