[Bug c++/82657] when using a template function pointer as a non-type template parameters, the template function will not be defined in some situation

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82657

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I'm pretty sure this is a dup of another bug I confirmed recently.