[Bug c++/111602] "Error: symbol is already defined" for variable template dependent on default argument lambda of class dependent on local type used in sfinae and non-sfinae contexts

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111602

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2023-09-26
     Ever confirmed|0                           |1

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Slightly reduced:
```
template<class> constexpr bool V = true;
struct F
{
        template<class T, bool = V<T>>
        F(T) {}
};
template<class T> struct C
{
        C(F = []{}) {}
};
template<class T>
decltype(T()) g()
{
        return T();
}
int main()
{
        g<C<int>>();
}
```

The local type of f() is not needed.