https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64587
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> --- Hmm, this code starts to be accepted in GCC 7.
[Bug c++/64587] [C++11] Wrong number of template arguments when template template parameter is template alias.
pinskia at gcc dot gnu.org via Gcc-bugs Sat, 31 Jul 2021 14:03:31 -0700
