Here is another new thing then. To quote Dan Sugalski about $1 etc in response to my claiming once that they were local:
No they aren't. They're mutant pseudo-scalars attached to the underlying optree, and you may well get a $1 from the last time you matched that regex. (I've got a trivial program that shows the problem with a recursive call)
(His "trivial program" causes threaded Perl to core-dump.)

In reply to RE (tilly) 2: Localized Backreferences by tilly
in thread Localized Backreferences, If Statements & Blocks by doran

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