[Buildbot-devel] locks exception

[Dobes Vandermeer]

I'm getting this assertion failure when using locks; as a result the
workspace lock (a SlaveLock held by the builder) is not honored and
the builder starts even though the lock is held by another builder:

          File "Z:\Tools\PythonLibs\Python24\twisted\scripts\_twistw.py",
line 44, in runApp
            app.runReactorWithLogging(config, oldstdout, oldstderr)
          File "Z:\Tools\PythonLibs\Python24\twisted\application\app.py",
line 128, in runReactorWithLogging
            reactor.run()
          File "Z:\Tools\PythonLibs\Python24\twisted\internet\posixbase.py",
line 200, in run
            self.mainLoop()
          File "Z:\Tools\PythonLibs\Python24\twisted\internet\posixbase.py",
line 208, in mainLoop
            self.runUntilCurrent()
        --- <exception caught here> ---
          File "Z:\Tools\PythonLibs\Python24\twisted\internet\base.py",
line 533, in runUntilCurrent
            call.func(*call.args, **call.kw)
          File "Z:\Tools\PythonLibs\buildbot\locks.py", line 43, in nowAvailable
            assert not self.owner
        exceptions.AssertionError: