I am amazed at this talk of the traps.....If your code is not working why not just debug it with a debugger where you can set breakpoints. The trap scheme that you are discussing seems like it wastes more time in anticipating a problem than in actually debugging a real problem in the code. Plus if your code is so haphazard that it you need all these traps to find all the bugs then possibly you may want to try a different development scheme that I always use. I write only a small part of the program first and then test that to ensure it works. Then I slowly add additional functionality and fully test each addition. By the time I get a robust program using this technique it ends up being amazingly modular and reliable.
Hope This Helps
Michael Karas