[Bug c++/96673] [8/9/10/11 Regression] Friend class with templates and default constructor not recognized in C++14 or later

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96673

--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
The ICE with -std=c++14 started with r216750.  It was fixed by r234442, but the
error appeared.