[Bug c++/77595] concepts: constrained member functions illegally instantiated during explicit class template instantiation

[akrzemi1 at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77595

--- Comment #3 from Andrzej Krzemienski <akrzemi1 at gmail dot com> ---
The part of the Standard that requires this:
http://eel.is/c++draft/temp.explicit#11