--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/g++.dg/cpp0x/friend5.C	Thu Feb 13 11:34:05 2020 +0900
@@ -0,0 +1,26 @@
+// PR c++/61327
+// { dg-do compile { target c++11 } }
+
+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();}
+};
+
+class Q : B{
+template <typename...> friend struct S;
+};
+
+int main(){
+    Q q;
+    S<int>::caller(&q);
+    return 0;
+}