The call from regcomp.c:15315 (S_handle_regex_sets) has: SV* u = NULL; [...] _invlist_union(lhs, rhs, &u); .. but that calls Perl__invlist_union_maybe_complement_2nd() with &u as 'output', which is documented as "SHOULD BE DEFINED upon input". Karl, can you take a look? Hugo --- via perlbug: queue: perl5 status: new https://rt.perl.org/Ticket/Display.html?id=129322Thread Next