twisted.spread.pb.RemoteError: -1
/usr/local/lib/python2.7/dist-packages/twisted/internet/defer.py:1384 in _inlineCallbacks
1383            if isFailure:
1384                result = result.throwExceptionIntoGenerator(g)
1385            else:
/usr/local/lib/python2.7/dist-packages/twisted/spread/pb.py:513 in throwExceptionIntoGenerator
512        """
513        return g.throw(RemoteError(self.type, self.value, self.traceback))
514
/usr/local/lib/python2.7/dist-packages/buildbot/process/buildstep.py:578 in runCommand
577        try:
578            res = yield command.run(self, self.remote)
579        finally:
twisted.spread.pb.RemoteError: -1