https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71568
--- Comment #4 from Jason Merrill <jason at gcc dot gnu.org> --- Created attachment 40833 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=40833&action=edit Fix Here's a patch. It seems pretty safe, but the bug isn't a regression. How important is it to have the fix in GCC 7, do you think?