[Bug c++/111113] Cannot define friend function of a local class in namespace scope

["pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111113

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Ever confirmed|0                           |1
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2023-08-23

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Confirmed.

Another testcase which might show what is really going on:
```
auto foo() {
    struct A;
    void bar(const A&);
    struct A { 
        friend void bar(const A&);
    };
    bar(A{});
    return A{};
}

using A = decltype(foo());
void bar(const A&) {}

int main()
{
        bar(foo());
}
```
We get the following error message:
```
<source>: In function 'int main()':
<source>:16:12: error: call of overloaded 'bar(foo()::A)' is ambiguous
   16 |         bar(foo());
      |         ~~~^~~~~~~
<source>:12:6: note: candidate: 'void bar(const A&)'
   12 | void bar(const A&) {}
      |      ^~~
<source>:5:21: note: candidate: 'void bar(const foo()::A&)'
    5 |         friend void bar(const A&);
      |                     ^~~
```
Which is not correct as bar in this case is the same bar.