--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/g++.dg/template/pr84789-3.C	Thu Oct 25 07:37:49 2018 +0900
@@ -0,0 +1,31 @@
+// { dg-do compile }
+
+struct A
+{
+  static int i;
+};
+struct B
+{
+  typedef ::A A;
+};
+int B::A::i = 0;
+
+struct K
+{
+  struct L
+  {
+    template <typename T>
+    static void f(T);
+  };
+};
+
+template <typename T>
+struct O
+{
+  typedef K Q;
+};
+
+template <typename T>
+void O<T>::Q::L::f(T)
+{
+}