https://bugs.exim.org/show_bug.cgi?id=2432
--- Comment #3 from Zoltan Herczeg <hzmes...@freemail.hu> --- I don't know much about php, but the following tests should be similar to yours. I ran pcre2test with jit and utf, and added a greedy + to match multiple characters. ./pcre2test -jit PCRE2 version 10.35-RC1 2019-11-27 This one matches to your test string: re> /[\p{L}\p{Arabic}]+/utf data> lowerUPPER 0: lowerUPPER This one matches to nothing: re> /[^\p{L}\p{Arabic}]+/utf data> lowerUPPER No match This one matches to space: re> /[^\p{L}\p{Arabic}]+/utf data> lower UPPER 0: The results seem valid. I will check 8.34. -- You are receiving this mail because: You are on the CC list for the bug. -- ## List details at https://lists.exim.org/mailman/listinfo/pcre-dev