https://bugs.exim.org/show_bug.cgi?id=2682
Philip Hazel <Philip.Hazel@???> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |WONTFIX
--- Comment #1 from Philip Hazel <Philip.Hazel@???> ---
PCRE1 (the 8.xx series) is obsolete and there is unlikely to be a new release.
PCRE2 (the 10.xx series) has been out for 6 years now. A lot of work has been
done on the code and this problem doesn't occur in PCRE2.
$ ./pcre2test zz
PCRE2 version 10.36 2020-12-04
/(a)(\1(?2)?)/
aaaaa
0: aaaaa
1: a
2: aaaa
$ perltest.sh zz
Perl v5.32.0
/(a)(\1(?2)?)/
aaaaa
0: aaaaa
1: a
2: aaaa
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