We saw this error
> nbytes = self._sock.recv_into(buf)
E ConnectionResetError: [Errno 104] Connection reset by peer
in @ponyisi's PR #546, but that seemed to pass on merge. :?
Originally posted by @matthewfeickert in #547 (comment)
I'm not sure why this is happening, and as it doesn't happen every time it might be hard to test, but it should probably be guarded against.