--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/g++.dg/concepts/pr67655.C	Thu Oct 25 07:37:49 2018 +0900
@@ -0,0 +1,20 @@
+// { dg-do compile { target c++11 } }
+// { dg-additional-options "-fconcepts" }
+
+template<class... Xs>                 
+void consume(Xs&&...) {}
+
+template<class... Xs>
+  struct A {
+    template<class... Ys>
+    requires requires(Ys... ys) {
+      consume(Xs{ys}...);
+    }
+  A(Ys&&... ys) {
+  }
+  A(int) {}
+};
+
+int main() {
+  A<int, double> a(55);
+}