?

> Even outside the debugger, you can establish a warnings handler:

Yes, since "for debugging" doesn't mean "inside debugger"

> And the reason $2 is undefined

see Re: On error, how to show the regexp values? (?: doesn't capture)

> has only one capture group, (\d).

capture groups are unrelated to \d

The outer parens would capture without the colon :

Cheers Rolf
(addicted to the Perl Programming Language and ☆☆☆☆ :)
Je suis Charlie!

In reply to Re^3: On error, how to show the regexp values? (tracing warnings) by LanX
in thread Tracing warnings: how to show the regexp values? by nikolay

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