Cache pickling issue in 1.8a1

[Mark Tranchant]

In 1.7.4, I can run the following in ../manage.py shell:

>>> from MyProject.models import *
>>> from django.core.cache import cache
>>> cl = MyModel.objects.filter(contributor__task__id=4)
>>> cl
<<< []
>>> type(cl)
<<< django.db.models.query.QuerySet
>>> cache.set('testing', cl)
>>> cache.get('testing')
<<< []

In 1.8a1, the last step generates an exception. See attachment for trace.

PicklingError: Can't pickle <type 'module'>: it's not found as __builtin__.module

[Mark Tranchant]

Exception trace