Good day!
It seems last code unit "c" is not detected and so start optimization don't work:
PCRE2 version 10.34-RC1 2019-04-22 /\Aabc/info,auto_callout Capture group count = 0 Max lookbehind = 1 Compile options: auto_callout Overall options: anchored auto_callout First code unit = 'a' Subject length lower bound = 3 abx --->abx +0 ^ \A +2 ^ a +3 ^^ b +4 ^ ^ c No match --## List details at https://lists.exim.org/mailman/listinfo/pcre-dev
