I suppose you are saying that reentrancy is only an issue with ?{code} and ??{code} constructs.

This is in fact an issue. The following one-liner will segfault (with perl 5.8.8):

perl -we '"_" =~ m{(??{"_" =~ /./})}'

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In reply to Re^3: is perl's regular expression engine reentrant ? (works) by betterworld
in thread is perl's regular expression engine reentrant ? by plank

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