exceptions.AttributeError: 'NoneType' object has no attribute 'write'
/srv/bb-master/virtualenv/local/lib/python2.7/site-packages/twisted/internet/defer.py:150 in maybeDeferred
149    try:
150        result = f(*args, **kw)
151    except:
/srv/bb-master/virtualenv/local/lib/python2.7/site-packages/buildbot/process/remotecommand.py:270 in remoteComplete
269                if maybeFailure:
270                    loog.addHeader("\nremoteFailed: %s" % maybeFailure)
271                else:
/srv/bb-master/virtualenv/local/lib/python2.7/site-packages/buildbot/status/logfile.py:559 in addHeader
558        """
559        self.addEntry(HEADER, text)
560        return defer.succeed(None)
/srv/bb-master/virtualenv/local/lib/python2.7/site-packages/buildbot/status/logfile.py:488 in addEntry
487            for w in self.watchers:
488                w.logChunk(self.step.build, self.step, self, channel, text)
489
/srv/bb-master/virtualenv/local/lib/python2.7/site-packages/buildbot/status/logfile.py:175 in logChunk
174        if self.consumer:
175            self.consumer.writeChunk((channel, chunk))
176
/srv/bb-master/virtualenv/local/lib/python2.7/site-packages/buildbot/status/web/logs.py:51 in writeChunk
50                formatted = formatted.encode('utf-8')
51            self.original.write(formatted)
52        except pb.DeadReferenceError:
/srv/bb-master/virtualenv/local/lib/python2.7/site-packages/twisted/web/server.py:220 in write
219                data = self._encoder.encode(data)
220            http.Request.write(self, data)
221
/srv/bb-master/virtualenv/local/lib/python2.7/site-packages/twisted/web/http.py:962 in write
961            else:
962                self.channel.write(data)
963
exceptions.AttributeError: 'NoneType' object has no attribute 'write'