--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/g++.dg/cpp0x/inh-ctor30.C	Thu Oct 25 07:37:49 2018 +0900
@@ -0,0 +1,27 @@
+// PR c++/81860
+// { dg-do compile { target c++11 } }
+// { dg-final { scan-assembler "_ZN1AIjEC\[12\]Ev" } }
+
+template <typename T>
+struct A
+{
+  A() {}
+};
+
+struct B
+{
+  template <typename D>
+  B(D, const A<unsigned>& a = A<unsigned>()) : a(a) {}
+
+  A<unsigned> a;
+};
+
+struct C : B
+{
+  using B::B;
+};
+
+int main()
+{
+  C c(0);
+}