Traceback (most recent call last):
      File "/usr/lib/python2.7/site-packages/buildbot/status/build.py", line 307, in buildFinished
        w.callback(self)
      File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 368, in callback
        self._startRunCallbacks(result)
      File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 464, in _startRunCallbacks
        self._runCallbacks()
      File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 551, in _runCallbacks
        current.result = callback(current.result, *args, **kw)
    --- <exception caught here> ---
      File "/usr/lib/python2.7/site-packages/buildbot/status/builder.py", line 535, in _buildFinished
        w.buildFinished(name, s, results)
      File "/usr/lib/python2.7/site-packages/buildbot/status/mail.py", line 468, in buildFinished
        return self.buildMessage(name, [build], results)
      File "/usr/lib/python2.7/site-packages/buildbot/status/mail.py", line 692, in buildMessage
        build=build, results=build.results)
      File "/usr/lib/python2.7/site-packages/buildbot/status/mail.py", line 672, in buildMessageDict
        self.master_status)
      File "/home/buildmaster/master/master.cfg", line 277, in html_message_formatter
        taskname = re.search("task=\['(.*)\.yml'\]", content[0]).group(1)
    exceptions.AttributeError: 'NoneType' object has no attribute 'group'