human
Solve the following python programming problem given the following code:
def _loopbackAsyncBody(server, serverToClient, client, clientToServer, pumpPolicy) : 
    "
    Transfer bytes from the output queue of each protocol to the input of the other.

    @param server: The protocol instance representing the server-side of this
    connection.

    @param serverToClient: The L{_LoopbackQueue} holding the server's output.

    @param client: The protocol instance representing the client-side of this
    connection.

    @param clientToServer: The L{_LoopbackQueue} holding the client's output.

    @param pumpPolicy: See L{loopbackAsync}.

    @return: A L{Deferred} which fires when the connection has been closed and
        both sides have received notification of this.
    " 
    def pump(source, q, target) : 
        sent = False 
        if q : 
            pumpPolicy (q, target) 
            sent = True 
if (sent and (not q)) : 
            source.transport._pollProducer () 
return sent 
while 1 : 
        disconnect = clientSent = serverSent = False 
        serverSent = pump (server, serverToClient, client) 
        clientSent = pump (client, clientToServer, server) 
        if ((not clientSent) and (not serverSent)) : 
            d = defer.Deferred () 
            clientToServer._notificationDeferred = d 
            serverToClient._notificationDeferred = d 
            d.addCallback (_loopbackAsyncContinue, server, serverToClient, client, clientToServer, pumpPolicy) 
            return d 
if serverToClient.disconnect : 
            disconnect = True 
            pump (server, serverToClient, client) 
else : 
            if clientToServer.disconnect : 
                disconnect = True 
                pump (disconnect, clientToServer, server) 
if disconnect : 
            server.connectionLost (failure.Failure (main.CONNECTION_DONE)) 
            client.connectionLost (failure.Failure (main.CONNECTION_DONE)) 
            return defer.succeed (None) 

    
    

    Fix the buggy line: pump (disconnect, clientToServer, server)
assistant
#Here is Python code to fix the buggy line: pump (disconnect, clientToServer, server)
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pump (client, clientToServer, server)