This snakelet will generate an error. And it uses the default error page.
File "/Users/irmen/Projects/www_snakelets/snakeserver/webapp.py", line 588, in run_snakelet
snake.serve(req, resp) # <------ the actual call to the snakelet!
File "/Users/irmen/Projects/www_snakelets/webapps/test/tsnakelets/test.py", line 151, in serve
c=a/b # BOOM !!! ;-)
ZeroDivisionError: integer division or modulo by zero