<URL: http://bugs.freeciv.org/Ticket/Display.html?id=39131 >
It actually occurs when the client connection is broken by the server
whereas the server is reading a packet from. A simple example is when
you attempt to cut yourself from the server. Then, your chat packet is
parsed by the server, server breaks your connection and tries to send
you processing_finished packet.
For an unknown reason by me, the client is not able to recognize anymore
it is connected to the server after reconnection.
So it seems a double bug between the server and client side.
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