[Bug c++/89612] internal compiler error: in push_access_scope, at cp/pt.c:237

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89612

--- Comment #4 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
And a better testcase, and actually valid:

template <typename> 
struct C {
  template <int N>
  friend int foo() noexcept(N);
};

template <int N>
int foo() noexcept(N);

C<int> c;