The -d option is disabled when you use the decrypt template from the Filter module at CPAN
Good move.
Try hitting it with perl -MO=Deparse file.pl and see what you get. Deparse uses the internal compiled structure, maybe you'll get lucky? with that. I don't know if you'll be able to run the B:: modules without the debugger (I've never compiled perl without it) so I'm just guessing here :)