I reported it on p5p and Simon Cozens contributed a patch so it should be fixed by 5.6.1.

I realize that that doesn't help you much. What I suggest you do is make up a file called PrincePawn.pm that looks like this:

   # PrincePawn.pm
   use warnings;
   use diagnostics;
   # and others...
   1;
[download]

Unfortunately, this does not work for strict, because strict has only a lexical effect.