1 files changed, 24 insertions, 0 deletions
diff --git a/gcc/testsuite/g++.dg/torture/pr69851.C b/gcc/testsuite/g++.dg/torture/pr69851.C
new file mode 100644
index 00000000000..17dbfa66b62
--- /dev/null
+++ b/gcc/testsuite/g++.dg/torture/pr69851.C
@@ -0,0 +1,24 @@
+// PR c++/69851
+// { dg-do compile }
+// { dg-options "-std=c++11" }
+
+template <typename T>
+struct A { T a; };
+template <unsigned long, typename...>
+struct B;
+template <unsigned long N, typename T, typename... U>
+struct B<N, T, U...> : B<1, U...>, A<T>
+{
+  B (B &) = default;
+  B (B &&x) : B(x) {}
+};
+template <unsigned long N, typename T>
+struct B<N, T> {};
+struct C { C (C &); };
+struct D {};
+
+void
+foo (B<0, C, D, int, int> a)
+{
+  B<0, C, D, int, int> b (a);
+}