https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71446
--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> --- So, shall we never try ck_list conversion for CONSTRUCTORs with any designators (while for -std=c++2a we'll complain if there is a mix of designated initializer clauses and non-designated initializ clauses, I think we don't diagnose that earlier, so maybe we need to cache it in some CONSTRUCTOR flag?), or never any conversion but ck_aggr?
