Am I right that this is considered fixed (or at least as fixed as it can be), and the issue should be closed?

Also, small note in case anyone stumbles across this in the future and is confused: Python does *not* handle this correctly on Windows. I suspect Christian was confused because there's an undocumented features on Windows where if you pass fileno=<opaque string returned by socket.share()>, then that correctly reinstantiates the socket object. But fileno=<raw socket handle> doesn't seem to do any special autodetection of type/family/proto.