In addition:if non-captured brackets replaces with captired ones, then result became "MATCH":
PCRE version 8.11 2010-12-10 /\A.*?(a|b(*THEN)c)/ ba 0: ba 1: a another example of this issue is: PCRE version 8.11 2010-12-10 /\A(?!(?:a(*THEN)b))/ ac No match PCRE version 8.11 2010-12-10 /\A(?!(a(*THEN)b))/ ac 0: --## List details at http://lists.exim.org/mailman/listinfo/pcre-dev
