commit 08235141a7e06db2b604b5869c9d8e4aaf8fa29b
Author: Tim Shen <timshen@google.com>
Date:   Tue Feb 14 13:55:18 2017 -0800

    2017-02-14  Tim Shen  <timshen@google.com>
    
            PR libstdc++/79513
            * include/std/variant (visit()): Forward variant types to the return
            type detection code.
            * testsuite/20_util/variant/compile.cc: Add test cases.

diff --git a/libstdc++-v3/include/std/variant b/libstdc++-v3/include/std/variant
index c5138e56803..866c4c40a61 100644
--- a/libstdc++-v3/include/std/variant
+++ b/libstdc++-v3/include/std/variant
@@ -1263,7 +1263,8 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 	__throw_bad_variant_access("Unexpected index");
 
       using _Result_type =
-	decltype(std::forward<_Visitor>(__visitor)(get<0>(__variants)...));
+	decltype(std::forward<_Visitor>(__visitor)(
+	    get<0>(std::forward<_Variants>(__variants))...));
 
       constexpr auto& __vtable = __detail::__variant::__gen_vtable<
 	_Result_type, _Visitor&&, _Variants&&...>::_S_vtable;
diff --git a/libstdc++-v3/testsuite/20_util/variant/compile.cc b/libstdc++-v3/testsuite/20_util/variant/compile.cc
index 65f4326c397..d40a4ccb784 100644
--- a/libstdc++-v3/testsuite/20_util/variant/compile.cc
+++ b/libstdc++-v3/testsuite/20_util/variant/compile.cc
@@ -291,6 +291,13 @@ void test_visit()
     };
     static_assert(visit(Visitor(), variant<int, nonliteral>(0)), "");
   }
+  // PR libstdc++/79513
+  {
+    std::variant<int> v(5);
+    std::visit([](int&){}, v);
+    std::visit([](int&&){}, std::move(v));
+    (void)v;
+  }
 }
 
 void test_constexpr()