--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/g++.dg/cpp0x/alias-decl-0.C	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,36 @@
+// { dg-do compile { target c++11 } }
+
+template<template<class> class TT> struct X { };
+template<class> struct Y { };
+template<class T> using Z = Y<T>;
+
+void f(X<Y>);
+void g(X<Z>);
+
+void
+foo()
+{
+    // Below x and y have the same type (DR 1286)
+    X<Y> y; 
+    X<Z> z;
+
+    // ... So these must compile.
+    f(z);   // { dg-bogus "" }
+    g(y);   // { dg-bogus "" }
+}
+
+template<class> struct A0 {};
+template<class T> using AA0 = A0<T>;
+template<class T> using AAA0 = AA0<T>;
+
+void f0(A0<int>);
+void
+g0()
+{
+  AA0<int> a;
+  AAA0<int> b;
+  f0(a);
+  f0(b);
+}
+
+