https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83102
--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> --- (In reply to Jonathan Wakely from comment #2) > This fails, because the comparison object in the set is const, and so it's s/it's/its/ The requirements in the standard were clarified by https://wg21.link/lwg2542 so I suppose strictly-speaking we should only reject it in C++17 mode, but our usual policy is to backport DRs to all modes where relevant (and we never supported the example in the DR, so the static_assert is just enforcing what was already the case in our implementation).
