[Bug c++/66836] inconsistent unqualified lookup for friend declaration

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66836

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
To clarify what I mean, consider:

struct X {
  void f();
  void g() {
    void f();
    f();
  }
};

The declaration of void f() inside X::g doesn't refer to X::f, because it
declares a (non-member) function called f. And so does "friend void f();"