https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70528
Jakub Jelinek <jakub at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |jakub at gcc dot gnu.org --- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> --- In PR58328 there is no explicit ctor at all, in this case the source actually has K() = default; With K() {} it works.