--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/g++.dg/cpp0x/friend4.C	Thu Feb 13 11:34:05 2020 +0900
@@ -0,0 +1,30 @@
+// PR c++/61327
+// { dg-do compile { target c++11 } }
+
+template<typename... T>
+struct A;
+
+template<typename T>
+struct A<T>
+{
+  template<typename U>
+  void f(U* u) {
+    u->T::g();
+  }
+};
+
+struct B {
+protected:
+  void g() { }
+};
+
+struct C : B {
+  template<typename...> friend struct A;
+};
+
+int main()
+{
+  C c;
+  A<B> a;
+  a.f(&c);
+}