diff --git a/libstdc++-v3/include/std/variant b/libstdc++-v3/include/std/variant
index c9504914365..eb3d6779205 100644
--- a/libstdc++-v3/include/std/variant
+++ b/libstdc++-v3/include/std/variant
@@ -611,7 +611,8 @@ namespace __variant
this->_M_destructive_copy(__rhs_index, __rhs_mem);
else
__variant_cast<_Types...>(*this)
- = variant<_Types...>(__rhs_mem);
+ = variant<_Types...>(std::in_place_index<__rhs_index>,
+ __rhs_mem);
}
}
else
diff --git a/libstdc++-v3/testsuite/20_util/variant/91807.cc b/libstdc++-v3/testsuite/20_util/variant/91807.cc
new file mode 100644
index 00000000000..ddede7c9b32
--- /dev/null
+++ b/libstdc++-v3/testsuite/20_util/variant/91807.cc
@@ -0,0 +1,34 @@
+// { dg-do compile { target c++17 } }
+
+// Copyright (C) 2020 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library. This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 3, or (at your option)
+// any later version.
+
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING3. If not see
+// .
+
+#include
+
+struct me_data {
+ me_data() = default;
+
+ me_data(const me_data &) {};
+ me_data(me_data &&) noexcept {};
+ me_data& operator=(const me_data &) = default;
+};
+
+int main() {
+ std::variant v1, v2;
+
+ v2 = v1;
+}