buildslave start traceback

gistfile1.txt

Following twistd.log until startup finished..
2013-04-23 08:20:18+0200 [-] Log opened.
2013-04-23 08:20:18+0200 [-] twistd 13.0.0 (/home/elmir/buildbot-upstream/sandbox/bin/python 2.7.3) starting up.
2013-04-23 08:20:18+0200 [-] reactor class: twisted.internet.epollreactor.EPollReactor.
2013-04-23 08:20:18+0200 [-] Starting BuildSlave -- version: latest
2013-04-23 08:20:18+0200 [-] recording hostname in twistd.hostname
2013-04-23 08:20:18+0200 [-] Starting factory <buildslave.bot.BotFactory instance at 0x9cbd68c>
2013-04-23 08:20:18+0200 [-] Connecting to localhost:9989
2013-04-23 08:20:18+0200 [-] Watching /home/elmir/buildbot-upstream/tst-slave/shutdown.stamp's mtime to initiate shutdown
Unhandled Error
Traceback (most recent call last):
  File "/home/elmir/buildbot-upstream/sandbox/local/lib/python2.7/site-packages/twisted/python/log.py", line 88, in callWithLogger
    return callWithContext({"system": lp}, func, *args, **kw)
  File "/home/elmir/buildbot-upstream/sandbox/local/lib/python2.7/site-packages/twisted/python/log.py", line 73, in callWithContext
    return context.call({ILogContext: newCtx}, func, *args, **kw)
  File "/home/elmir/buildbot-upstream/sandbox/local/lib/python2.7/site-packages/twisted/python/context.py", line 118, in callWithContext
    return self.currentContext().callWithContext(ctx, func, *args, **kw)
  File "/home/elmir/buildbot-upstream/sandbox/local/lib/python2.7/site-packages/twisted/python/context.py", line 81, in callWithContext
    return func(*args,**kw)
--- <exception caught here> ---
  File "/home/elmir/buildbot-upstream/sandbox/local/lib/python2.7/site-packages/twisted/internet/posixbase.py", line 619, in _doReadOrWrite
    why = selectable.doWrite()
exceptions.AttributeError: '_SIGCHLDWaker' object has no attribute 'doWrite'
2013-04-23 08:20:18+0200 [Broker,client] message from master: attached
The buildslave appears to have (re)started correctly.