[perl #129322] S_invlist_clear(SV *): Assertion `invlist' failed(regcomp.c:8527)

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

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via perlbug:  queue: perl5 status: new
https://rt.perl.org/Ticket/Display.html?id=129322

• [perl #129322] S_invlist_clear(SV *): Assertion `invlist' failed(regcomp.c:8527) by Hugo van der Sanden via RT
• Re: [perl #129322] S_invlist_clear(SV *): Assertion `invlist' failed(regcomp.c:8527) by Karl Williamson
• [perl #129322] S_invlist_clear(SV *): Assertion `invlist' failed(regcomp.c:8527) by Hugo van der Sanden via RT
• Re: [perl #129322] S_invlist_clear(SV *): Assertion `invlist' failed(regcomp.c:8527) by Karl Williamson