The strict module is really great! I'm not such a big fan of warnings, it makes the program crash and I have no idea why.

warnings can't make your program "crash". It will spit out, ehm... warnings. Generally this is good, because it is an indication that you may be doing something wrong, and you'd better take care of correcting that. OTOH in the rare situations in which you feel a particular warning is unjustified, you can still locally disable it.