id	summary	reporter	owner	description	type	status	priority	milestone	version	resolution	keywords	cc
2253	Deal gracefully with exceptions thrown before a build is fully started.	tom.prince		"Traceback from #2252 demonstrating this.

{{{
2012-03-22 14:23:39+1300 [-] Unhandled error in Deferred:
2012-03-22 14:23:39+1300 [-] Unhandled Error
        Traceback (most recent call last):
          File ""/usr/local/lib/python2.7/site-packages/buildbot-0.8.6-py2.7.egg/buildbot/process/build.py"", line 396, in _stepDone
            return self.startNextStep()
          File ""/usr/local/lib/python2.7/site-packages/buildbot-0.8.6-py2.7.egg/buildbot/process/build.py"", line 387, in startNextStep
            d.addErrback(self.buildException)
          File ""/usr/local/lib/python2.7/site-packages/Twisted-12.0.0-py2.7-linux-x86_64.egg/twisted/internet/defer.py"", line 312, in addErrback
            errbackKeywords=kw)
          File ""/usr/local/lib/python2.7/site-packages/Twisted-12.0.0-py2.7-linux-x86_64.egg/twisted/internet/defer.py"", line 290, in addCallbacks
            self._runCallbacks()
        --- <exception caught here> ---
          File ""/usr/local/lib/python2.7/site-packages/Twisted-12.0.0-py2.7-linux-x86_64.egg/twisted/internet/defer.py"", line 551, in _runCallbacks
            current.result = callback(current.result, *args, **kw)
          File ""/usr/local/lib/python2.7/site-packages/buildbot-0.8.6-py2.7.egg/buildbot/process/build.py"", line 491, in buildException
            self.buildFinished([""build"", ""exception""], EXCEPTION)
          File ""/usr/local/lib/python2.7/site-packages/buildbot-0.8.6-py2.7.egg/buildbot/process/build.py"", line 507, in buildFinished
            self.remote.dontNotifyOnDisconnect(self.lostRemote)
          File ""/usr/local/lib/python2.7/site-packages/Twisted-12.0.0-py2.7-linux-x86_64.egg/twisted/spread/pb.py"", line 306, in dontNotifyOnDisconnect
            self.disconnectCallbacks.remove(callback)
        exceptions.ValueError: list.remove(x): x not in list
}}}"	defect	closed	major	undecided	0.8.6	fixed