The Tor Browser / file revision

 // |jit-test|

 // If an exception unwind hook performs a forced return, and this calls an

 // onPop handler that throws, the exception should not be handled in the

 // current frame but propagated to the caller.

 var g = newGlobal();

 var dbg = new Debugger(g);

 g.eval('function f() { try { var y; throw 123; } catch(e) { assertEq(0, 1); } }');

 dbg.onExceptionUnwind = function(frame) {

     frame.onPop = function() {

 	return {throw: 321};

     }

     return {return: 11};

 };

 try {

     g.f();

     assertEq(0, 1);

 } catch(e) {

     assertEq(e.toString().contains("321"), true);

 }