[Bug c++/91418] Nested class of templated class cannot declare parent class friend

[Darrell.Wright at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91418

--- Comment #1 from Darrell Wright <Darrell.Wright at gmail dot com> ---
The template isn't part of it, 
https://gcc.godbolt.org/z/KCok90