Template friend declaration gets removed

[Sergey Semushin]

Example:

template <typename T>
class C;
template <typename T>
class D
{
  static void f ();
  template <typename>
  friend class C;
};
template <typename T>
class C
{
public:
  static void f ()
  {
    D<T>::f ();
  }
};
int main ()
{
  C<int>::f ();
}

Everything else is preserved but

template <typename>
friend class C;

gets removed which makes D<T> inaccessible from C<T>