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Edward Hervey authored
We have a dedicated one-shot thread to handle cleanup of old groups. While this is a good idea. It's an even better idea to make sure that thread is *completed* before the parsebin element to which it is related isn't freed/gone. * There can only be one cleanup thread happening at any point in time. If there is already one, we wait for the previous one to finish. * When shutting down (NULL=>READY) make sure the thread is finished https://bugzilla.gnome.org/show_bug.cgi?id=790007
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