Index: g++.dg/other/vararg-4.C
===================================================================
--- g++.dg/other/vararg-4.C	(revision 0)
+++ g++.dg/other/vararg-4.C	(working copy)
@@ -0,0 +1,12 @@
+// PR c++/37404
+
+typedef __builtin_va_list __gnuc_va_list;
+typedef __gnuc_va_list va_list;
+
+template <class> struct S { static void foo () { } };
+template <class T, int N>
+struct S<T [N]> { static void foo () { T(); } };
+
+int main () {
+  S<va_list>::foo();
+}