id summary reporter owner description type status milestone component version severity resolution keywords cc 10135 [container] flat_map::insert() is ambiguous if used with pair that requires conversion Sebastian Karlsson Ion Gaztañaga "The following is a no go it seems: boost::container::flat_map< int, int > fm; fm.insert( std::make_pair( 0u, 0 ) ); Because the pair has to be converted, but it can be converted to either std::pair<> or container::container_details::pair<>." Bugs closed To Be Determined container Boost 1.55.0 Problem duplicate