TypeError: Cannot call method 'say' of undefined

[cjb]

Refactor branch. This one's much harder to reproduce, happened after 48 hours of Subway uptime.

{ prefix: 'foo@bar',
  nick: 'foo',
  user: '~foo',
  host: '1.1.1.1',
  command: 'PRIVMSG',
  rawCommand: 'PRIVMSG',
  commandType: 'normal',
  args:
   [ '##javascript',
     'falafel: you can just bust out a function () {} for that' ],
  client_server: 'chat.freenode.net' }

/home/ubuntu/subway/lib/connection.js:307
      client.say(data.target, data.text);
             ^
TypeError: Cannot call method 'say' of undefined
    at Socket.<anonymous> (/home/ubuntu/subway/lib/connection.js:307:14)
    at Socket.EventEmitter.emit [as $emit] (events.js:95:17)
    at SocketNamespace.handlePacket (/home/ubuntu/subway/node_modules/socket.io/lib/namespace.js:335:22)
    at Manager.onClientMessage (/home/ubuntu/subway/node_modules/socket.io/lib/manager.js:488:38)
    at WebSocket.Transport.onMessage (/home/ubuntu/subway/node_modules/socket.io/lib/transport.js:387:20)
    at Parser.<anonymous> (/home/ubuntu/subway/node_modules/socket.io/lib/transports/websocket/hybi-16.js:39:10)
    at Parser.EventEmitter.emit (events.js:95:17)
    at finish (/home/ubuntu/subway/node_modules/socket.io/lib/transports/websocket/hybi-16.js:288:16)
    at Parser.expectHandler (/home/ubuntu/subway/node_modules/socket.io/lib/transports/websocket/hybi-16.js:299:15)
    at Parser.add (/home/ubuntu/subway/node_modules/socket.io/lib/transports/websocket/hybi-16.js:466:24)