https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93479
--- Comment #3 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Jonathan Wakely <r...@gcc.gnu.org>: https://gcc.gnu.org/g:83b0201035cfdc1d4d80153f4e19ec98cf059941 commit r10-6324-g83b0201035cfdc1d4d80153f4e19ec98cf059941 Author: Jonathan Wakely <jwak...@redhat.com> Date: Wed Jan 29 13:36:15 2020 +0000 libstdc++: Make std::compare_three_way check if <=> is valid (PR 93479) Currently types that cannot be compared using <=> but which are convertible to pointers will be compared by converting to pointers first. They should not be comparable. PR libstdc++/93479 * libsupc++/compare (__3way_builtin_ptr_cmp): Require <=> to be valid. * testsuite/18_support/comparisons/object/93479.cc: New test.