[Buildbot] #3248: BuildStep should properly interrupt steps

[Buildbot trac]

#3248: BuildStep should properly interrupt steps
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Reporter:  vlovich  |       Owner:  jaredgrubb
    Type:  defect   |      Status:  assigned
Priority:  major    |   Milestone:  0.9.+
 Version:  0.8.10   |  Resolution:
Keywords:           |
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Comment (by jaredgrubb):

 I think I have a patch for this; posted at
 https://github.com/buildbot/buildbot/pull/1822 and up for test if you
 want.

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Ticket URL: <http://trac.buildbot.net/ticket/3248#comment:3>
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