[DotGNU]Test case with Qt#

[Marcus]

Could someone please take a look at this program we're having with signals and 
slots? Basically, if an exception occurs within a C# slot handler, the 
runtimes are acting strangely. I made a demo that requires Qt#. When you 
click the button, the program should throw an ArgumentException.

Instead, mono serendipitously ends up throwing a null reference exception. It 
aborts, but really for the wrong reason insofar as the exception printed 
isn't the correct exception.

ilrun instead acts as though the exception were just a return statement. I 
think it has something to do with unwinding the stack improperly, but I'm not 
really sure why. When I write a simple test case that doesn't involve Qt, 
throwing an exception in a C# method that has been called from C++ works 
fine. However, the stack is a lot more complicated when a slot handler is 
called in Qt.