https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109277
Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- See Also|https://gcc.gnu.org/bugzill |https://gcc.gnu.org/bugzill |a/show_bug.cgi?id=96592 |a/show_bug.cgi?id=107049 Component|libstdc++ |c++ --- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> --- The difference is is_convertible definition. 12: template<typename _From, typename _To> struct is_convertible : public __is_convertible_helper<_From, _To>::type { }; 13: template<typename _From, typename _To> struct is_convertible : public __bool_constant<__is_convertible(_From, _To)> { }; So it might be a front-end issue after all.