https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66438
--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> --- Created attachment 35708 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=35708&action=edit Compare old and new categories This fixes this specific testcase, but not all cases (if you compare error_condition objects created in different translation unit compiled with different GCC versions then whether it works depends on which error_condition is on the left-hand side).
