id summary reporter owner description type status milestone component version severity resolution keywords cc 11006 Impossible to instantiate time_fmt_io_saver due to several errors. rkawulak viboes "1. time_point_io.hpp:535:49: error: no matching function for call to ‘get_time_fmt(boost::chrono::time_fmt_io_saver >::state_type&)’ ios_base_state.hpp:135:37: note: template argument deduction/substitution failed 2. time_point_io.hpp:564:38: error: no matching function for call to ‘set_time_fmt(boost::chrono::time_fmt_io_saver >::aspect_type&, boost::chrono::time_fmt_io_saver >::aspect_type&)’ ios_base_state.hpp:141:17: note: template argument deduction/substitution failed" Bugs closed Boost 1.58.0 chrono Boost Development Trunk Problem fixed