This is the revision history for -w in <freenode.net:##NULL>

factoid_idsubjectcopulapredicateauthornamespace
15439 -w is Don't use -w, it's too eager. use warnings; instead | https://perldoc.perl.org/warnings#What%27s-wrong-with-w-and-$%5EW grinnz <*:##NULL>
14589 -w is Don't use -w, it's too eager. use warnings; instead | https://perldoc.pl/warnings#What%27s-wrong-with-w-and-$%5EW simcop2387 <*:##NULL>
8917 -w is Don't use -w, it's too eager. use warnings; instead altreus <*:##NULL>