do not allow level 0 for user-generated exceptions
do not allow level 0 for user-generated exceptions

unbit/uwsgi.it,Mikrobit/uwsgi.it,Mikrobit/uwsgi.it,Mikrobit/uwsgi.it,Mikrobit/uwsgi.it,unbit/uwsgi.it,unbit/uwsgi.it,unbit/uwsgi.it