in reply to Invoking the debugger on yourself

I'm not sure I would have modified my script to include -d on the shebang line. That's the kind of thing I'd forget to take out. Is there some reason you didn't want to start your script with: 
PERLDB_OPTS=nonstop perl -wd myprogram myarg1 myarg2...

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? Or even: 
PERLDB_OPTS=nonstop PERL5OPT=-wd myprogram myarg1 myarg2...

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In Section Cool Uses for Perl