https://bugs.exim.org/show_bug.cgi?id=2764
Zoltan Herczeg <hzmester@???> changed:
What |Removed |Added
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CC| |hzmester@???
--- Comment #2 from Zoltan Herczeg <hzmester@???> ---
Maybe I can give a bit more insight about the problem. Certain single character
repetitions are "enhanced" by JIT, that means if certain conditions apply, they
fail immediately. You can read more about it here:
https://zherczeg.github.io/sljit/pcre2_jit.html
This issue requires two single character repetitions with a capturing bracket
around the first one, and a literal character before the capturing bracket. One
simple example:
pattern /#(A+)#\d+/ does not match to #A#A#0
The issue is caused by not passing some data to the recursive call which
process the capturing bracket during the compilation phase. This cause multiple
issues later. Without the capturing bracket, the pattern works, since there is
no recursive call: /#A+#\d+/ matches to #A#A#0
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