[Buildbot] #3277: Builds that contain commands with SlaveLocks fail with exceptions due to inability to coerce SlaveLock to renderable

[Buildbot trac]

#3277: Builds that contain commands with SlaveLocks fail with exceptions due to
inability to coerce SlaveLock to renderable
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Reporter:  cody       |       Owner:
    Type:  undecided  |      Status:  new
Priority:  major      |   Milestone:  0.8.x
 Version:  master     |  Resolution:
Keywords:             |
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Comment (by vlovich):

 The PR is only relevant if you have backported
 https://github.com/buildbot/buildbot/pull/1670 to eight.  Can you also
 attach your buildbot/process/properties.py &
 buildbot/process/buildstep.py?

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Ticket URL: <http://trac.buildbot.net/ticket/3277#comment:5>
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