[Twisted-Python] SerialPort.loseConnection() BUG

[biziap biziap]

>>Maybe you can try to call transport.flushInput(), transport.flushOutput()
>>before loseConnection().
>>
>
> No, this is wrong.  Do not call these methods, ever.
>

I have experienced the same problem,
by calling the flashOutput, flashInput solved that problem in my case.
Maybe it is a workaround. I'd like to know how to do with it is the right way?
Thanks in advance.

Sorry about the top-post, hope that this time I am doing it right.