--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/g++.dg/template/qualified-id7.C	Thu Oct 25 07:37:49 2018 +0900
@@ -0,0 +1,15 @@
+// PR c++/85731
+// { dg-do compile { target c++11 } }
+
+    template <typename T>
+    struct Outer {
+        struct Inner;
+        template <int I> static void f();
+    };
+
+    template <typename T>
+    struct Outer<T>::Inner {
+        decltype(Outer<T>::f<42>()) f();
+    };
+
+    int main() { Outer<int>::Inner().f(); }