[Bug c++/61327] Problem with friend template object

[isak50 at mail dot ru]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61327

--- Comment #2 from Pavel <isak50 at mail dot ru> ---
// Clang compiles without errors.
class B {
protected:
  void f() {}
};

template <typename...>
struct S;

template <typename R>
struct S<R>{
    template <typename T>
    static void caller(T *p) {p->B::f();}   // error: 'void B::f()' is
protected
    //static void caller(T *p) {p->f();}    // Ok
};

class Q : B{
template <typename...> friend struct S;
};

int main(){
    Q q;
    S<int>::caller(&q);
    return 0;
}