[Bug c++/86823] [7/8/9 Regression] private member template struct/class is publicly accessible

[aoliva at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86823

--- Comment #6 from Alexandre Oliva <aoliva at gcc dot gnu.org> ---
https://gcc.gnu.org/ml/gcc-patches/2018-11/msg01558.html