--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/g++.dg/concepts/pr84423-2.C	Thu Oct 25 07:37:49 2018 +0900
@@ -0,0 +1,18 @@
+// { dg-do compile { target c++11 } }
+// { dg-additional-options "-fconcepts" }
+
+using A = auto;  // { dg-error "11:.auto. not allowed in alias declaration" }
+
+using A1 = const auto;  // { dg-error "18:.auto. not allowed in alias declaration" }
+
+using A2 = volatile auto;  // { dg-error "21:.auto. not allowed in alias declaration" }
+
+using A3 = const volatile auto;  // { dg-error "27:.auto. not allowed in alias declaration" }
+
+typedef auto B;  // { dg-error "9:typedef declared .auto." }
+
+typedef const auto B1;  // { dg-error "15:typedef declared .auto." }
+
+typedef volatile auto B2;  // { dg-error "18:typedef declared .auto." }
+
+typedef const volatile auto B3;  // { dg-error "24:typedef declared .auto." }