id summary reporter owner description type status milestone component version severity resolution keywords cc 7791 suspicious code in shared_mutex::unlock_upgrade Andrey viboes "shared_mutex::unlock_upgrade contains following code: {{{ if(last_reader) { release_waiters(old_state); } else { release_waiters(old_state); } }}} " Bugs closed To Be Determined thread Boost 1.52.0 Cosmetic wontfix