1 files changed, 29 insertions, 0 deletions
diff --git a/test/std/utilities/function.objects/func.wrap/func.wrap.func/derive_from.pass.cpp b/test/std/utilities/function.objects/func.wrap/func.wrap.func/derive_from.pass.cpp
new file mode 100644
index 000000000000..5bdf9e98e897
--- /dev/null
+++ b/test/std/utilities/function.objects/func.wrap/func.wrap.func/derive_from.pass.cpp
@@ -0,0 +1,29 @@
+//===----------------------------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++98, c++03
+// REQUIRES-ANY: c++11, c++14
+
+// <functional>
+
+// See https://llvm.org/bugs/show_bug.cgi?id=20002
+
+#include <functional>
+#include <type_traits>
+
+#include "test_macros.h"
+
+using Fn = std::function<void()>;
+struct S : public std::function<void()> { using function::function; };
+
+int main() {
+    S s( [](){} );
+    S f1( s );
+    S f2(std::allocator_arg, std::allocator<int>{}, s);
+}