Traceback (most recent call last):
  File "blatta", line 143, in <module>
    main(sys.argv)
  File "blatta", line 139, in main
    server.start()
  File "/usr/home/jon/code/blatta/blatta_sp/lib/server.py", line 192, in start
    self.station.handle_udp_data(bytes_address_pair)
  File "/usr/home/jon/code/blatta/blatta_sp/lib/station.py", line 35, in handle_udp_data
    message = self.infosec.unpack(peer, data)
  File "/usr/home/jon/code/blatta/blatta_sp/lib/infosec.py", line 234, in unpack
    self_chain_valid = (self_chain_check == self_chain)
UnboundLocalError: local variable 'self_chain_check' referenced before assignment