The Tor Browser / file revision

 // |jit-test|

 // If a frame's onPop handler throws, we should not call the

 // onExceptionUnwind hook for that frame.

 var g = newGlobal();

 var dbg = new Debugger(g);

 g.eval('function f() { var y; debugger; }');

 dbg.onExceptionUnwind = function() {

     assertEq(0, 1);

 };

 dbg.onDebuggerStatement = function handleDebugger(frame) {

     frame.onPop = function(c) {

 	return {throw: 555};

     }

 };

 try {

     g.f();

     assertEq(0, 2);

 } catch(e) {

     assertEq(e.toString().contains("555"), true);

 }