1 files changed, 43 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/testsuite/g++.dg/cpp0x/alias-decl-44.C b/gcc-4.9/gcc/testsuite/g++.dg/cpp0x/alias-decl-44.C
new file mode 100644
index 0000000..bd20b54
--- /dev/null
+++ b/gcc-4.9/gcc/testsuite/g++.dg/cpp0x/alias-decl-44.C
@@ -0,0 +1,43 @@
+// PR c++/63849
+// { dg-do compile { target c++11 } }
+
+template <class _T, class...>
+using First = _T;            // we should not use this
+                             // alias with only
+                             // one pack parameter (?)
+
+template <template <class...> class _Successor,
+          int,
+          class... _Xs>
+struct Overlay
+{
+    using O = _Successor<_Xs...>;
+};
+
+template <class... _Pack>
+struct List
+{
+    template <int _s>
+    using O = typename Overlay<List, _s, _Pack...>::O;
+
+    template <template <class...> class _S>
+    using Pass = _S<_Pack...>;
+
+    template <int _i>
+    using At = typename O<_i>
+    ::template Pass<First>;
+};
+
+template <int _i>
+using At = typename List<int, char>
+::template At<_i>;
+
+template <int _i>
+void func_crash(At<_i>&) {}
+
+int main(int argc, char *argv[])
+{
+    char ccc;
+    int iii;
+    func_crash<0>(iii);
+}