--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/g++.dg/cpp2a/fn-template10.C	Thu Feb 13 11:34:05 2020 +0900
@@ -0,0 +1,22 @@
+// P0846R0
+// { dg-do compile }
+// { dg-options "-std=c++2a" }
+
+int h;
+void g();
+void e();
+void e(int);
+void e(int, int);
+
+namespace N {
+  struct A { };
+  template <class T> static int f(T) { return 1; }
+  template <class T> static int g(T) { return 2; }
+  template <class T> static int h(T);
+  template <class T> static int e(T) { return 3; }
+}
+
+int v = e<N::A>(N::A());
+int x = f<N::A>(N::A());
+int y = g<N::A>(N::A());
+int z = h<N::A>(N::A()); // { dg-error "expected" }