I'm getting some strange errors with unpickling. I've tried all
combinations of pickle/cPickle and protocol in (0,1,2) and still
getting this apparent random error:
sqlalchemy.orm.collections:622 __setstate__
self.attr = getattr(d['owner_state'].obj().__class__,
d['key']).impl
AttributeError: type object 'NoneType' has no attribute 'flights'
When I inspect this frame, I see that:
>>> d['owner_state'].obj
<bound method InstanceState.obj of <sqlalchemy.orm.state.InstanceState
object at 0xa1b5acc>>
So it seems that __setstate__ is not being called for the
InstanceState object.
Any ideas?
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