id summary reporter owner description type status milestone component version severity resolution keywords cc 4428 serial_port Bugs tirelessfighter@… chris_kohlhoff when you use a USB-Serial Port convertor and when use a async_write to send a large buffer to Serial Port,at the time of sending data, you pull out the USB-Serail Port Convertor from computer. the async call back handler for sending and receiving will not get a error and the io_service can't be delete. Bugs new Boost 1.44.0 asio Boost 1.43.0 Problem serial_port