[Twisted-Python] leakage between tests with trial when code under test uses deferToThread

[Chris Withers]

Hi All,

Does trial do anything to clean up stuff that's been passed to 
deferToThread?

I'm seeing what looks like leakage between tests where stuff that is 
deferred to a thread from a LoopingCall is resulting in a DelayedCall 
ending up in the reactor for the next test.
Does that ring any bells?

cheers,

Chris