[Buildbot] #3401: Reference to deleted BuildStepStatus

[Buildbot trac]

#3401: Reference to deleted BuildStepStatus
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Reporter:  gtmacdonald  |       Owner:
    Type:  defect       |      Status:  new
Priority:  major        |   Milestone:  0.9.+
 Version:  0.8.12       |  Resolution:
Keywords:               |
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Comment (by rutsky):

 @gtmacdonald, can you provide configuration example in which this issue
 can be reproduced?

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Ticket URL: <http://trac.buildbot.net/ticket/3401#comment:2>
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