Ticket #9964: boost.patch

fusion/container/map/detail/map_impl.hpp

@@ -73 +73 @@
         {}
 
         map_impl(map_impl&& rhs)
-          : rest_type(std::forward<rest_type>(*static_cast<rest_type*>(this)))
+          : rest_type(std::forward<rest_type>(rhs.get_base()))
           , element(std::forward<Pair>(rhs.element))
         {}