https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80485
--- Comment #2 from Jason Merrill <jason at gcc dot gnu.org> --- Created attachment 44167 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44167&action=edit proposed fix https://gcc.gnu.org/ml/gcc-patches/2018-05/msg00968.html
