That panic error sure sounds like a perl bug; I couldn't reproduce it in 5.8.0 in a quick test. Can you provide a very short but complete example that exhibits the error?

Off the top of my head, you might try introducing some interpolation to see if that would make a difference:

s/\[\[(\w+)\]\]/$helper->("$1")/eg;
or maybe:
s/\[\[(\w+)\]\]/"@{[$helper->($1)]}"/eg;
or even an explicit copy:
s/\[\[(\w+)\]\]/my $match = $1; $helper->($match)/eg;
Functionally, these should be no different, but if this is an internal perl bug, these alternatives may take a different code path and might not trip over the bug... (If you're lucky!)

In reply to Re: Functions in substitutions (s///) and Perl 5.8. by Anonymous Monk
in thread Functions in substitutions (s///) and Perl 5.8. by v_thunder

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