https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99734
--- Comment #2 from Alexander Lelyakin <alexander.lelyakin at googlemail dot com> --- Not reproduced anymore. The first case has changed diagnostic to: wrong number of template arguments (1, should be 2) [99274] The second case has changed diagnostic to: non-template type ‘rebind_alloc’ used as a template [99735]