AttributeError: 'module' object has no attribute '_RLock'

New submission from thijs <[email protected]>:

The Jython buildslave currently throws the following [http://buildbot.twistedmatrix.com/builders/ubuntu64-jython2.5-select/builds/251/steps/trial/logs/stdio error] with Jython 2.5.1 trunk:

{{{
#!python
Traceback (most recent call last):
  File "./bin/trial", line 21, in <module>
    from twisted.scripts.trial import run
  File "/home/buildbot/Buildslaves/twisted/jython2.5-thijs-ubuntu/Twisted/twisted/scripts/trial.py", line 9, in <module>
    from twisted.internet import defer
  File "/home/buildbot/Buildslaves/twisted/jython2.5-thijs-ubuntu/Twisted/twisted/internet/defer.py", line 15, in <module>
    from twisted.python import log, failure, lockfile
  File "/home/buildbot/Buildslaves/twisted/jython2.5-thijs-ubuntu/Twisted/twisted/python/log.py", line 19, in <module>
    from twisted.python import util, context, reflect
  File "/home/buildbot/Buildslaves/twisted/jython2.5-thijs-ubuntu/Twisted/twisted/python/context.py", line 22, in <module>
    from twisted.python import threadable
  File "/home/buildbot/Buildslaves/twisted/jython2.5-thijs-ubuntu/Twisted/twisted/python/threadable.py", line 117, in <module>
    init(True)
  File "/home/buildbot/Buildslaves/twisted/jython2.5-thijs-ubuntu/Twisted/twisted/python/threadable.py", line 68, in init
    class XLock(threadingmodule._RLock, object):
AttributeError: 'module' object has no attribute '_RLock'
}}}

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Type     : defect
Component: core
Keywords : jython
Priority : normal
Nosy     : pjenvey, thijs
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http://twistedmatrix.com/trac/ticket/4002