https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114620
Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Ever confirmed|0 |1 Last reconfirmed| |2024-04-09 Status|UNCONFIRMED |NEW --- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> --- The first one is rejected by EDG, clang, GCC and MSVC for similar reasons. MSVC: <source>(13): error C2440: 'specialization': cannot convert from 'int Base::* ' to 'int Derived::* ' <source>(13): note: Standard conversion from pointer-to-member of base to pointer-to-member of derived is not applied for template arguments But the constexpr version is definitely a GCC bug as it is accepted by all 3 other compilers.