--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/g++.dg/pr94027.C	Mon May 25 07:50:57 2020 +0900
@@ -0,0 +1,22 @@
+// { dg-do compile { target c++11 } }
+// PR 94027 ICE mangling
+
+class a {
+public:
+  a (char);
+};
+struct b {
+  b (a);
+};
+template <typename... aw, int...>
+void ax (int)
+{
+  struct c : b {
+    c () : b {sizeof...(aw)}
+    {}
+  };
+}
+
+void az() {
+  ax ({});
+}