Hi, Philip! Look at this pcretest listing please:
PCRE version 8.37 2015-04-28 /(?(DEFINE)(?<a>(?:1|(?&b)(?&a))?+)(?<b>2))/ismxS+Failed: internal error: previously-checked referenced subpattern not found at offset 42
It seems this result is erroneous. Thanx a lot. -- ## List details at https://lists.exim.org/mailman/listinfo/pcre-dev
