[Bug c++/70984] Templated derived class erroneously allows taking address of private base class member functions

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70984

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Please check the known bugs linked to from PR 59002 as I'm pretty sure this is
a duplicate of one of them.