id summary reporter owner description type status milestone component version severity resolution keywords cc 11196 variant missing type traits header file anonymous ebf variant::element_index depends on boost::type_traits, specifically boost::remove_cv but doesn't include the header file for it. As such my builds are failing to compile with the error being that boost::remove_cv is an undeclared identifier. Bugs closed Boost 1.59.0 variant Boost 1.58.0 Regression fixed