llvm-gcc-4.0/gcc/testsuite/g++.old-deja/g++.pt/friend24.C

// { dg-do assemble  }

template <class T>
struct S
{
  template <class U = T>
  friend class S;

  void f(T);
};

template struct S<int>;

void g()
{
  S<> s;
  s.f(3);
}