[Bug c++/68093] [concepts] friend function declarations that differ only by constraints are rejected as redefinitions

[eric.niebler at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68093

--- Comment #1 from Eric Niebler <eric.niebler at gmail dot com> ---
Still happens on trunk, 2 years later:

template <class T>
concept bool True = true;

template <class T>
struct S {
  friend bool operator==(S, int) requires True<T> { return true; }
  friend bool operator==(S, int) requires !True<T> { return true; }
};

int main() {
  S<int> s;
}

:-(