$1 and $2 are package variables, not lexicals. You can nest their contents with local. Lexical $_ is a new addition from 5.10.0 onwards.
Best practice is simply to copy out $1 and ilk to lexicals, the way you're doing it (but within a conditional, checking that the match succeeded).
• another intruder with the mooring in the heart of the Perl
In reply to Re: my $1
in thread my $1
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