[Bug c++/110936] if constexpr: member function pointers cannot be checked with ubsan

[johelegp at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110936

--- Comment #1 from Johel Ernesto Guerrero Peña <johelegp at gmail dot com> ---
This should block BUG101603.