https://bugs.exim.org/show_bug.cgi?id=2527
--- Comment #5 from Philip Hazel ---
I have committed (r1224) code that uses Unicode character properties for casing
operations when PCRE2_UCP is set, whether or not PCRE2_UTF is used. This
currently applies only the the interpreter (and substitute),
> Matching with jit, it was very easy to produce an example which
> exceeds the available resources: We take the pattern
> "(*LIMIT_MATCH=10)(x+x+x+x+)+y" and as subject we take a string of
> length 10 containing only the letter "x".
Philip summarizes this well. In case of your example, 5 x-s
