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Mike Bayer
9727cdecbe
Fixed regression caused by just-released performance fix mentioned in #6550 where a query.join() to a relationship could produce an AttributeError if the query were made against non-ORM structures only, a fairly unusual calling pattern. In this fix, since we are no longer going through the production of ``__clause_element__()`` for Cls.some_relationship, I assumed we just throw this object away completely but I missed the one little bit where we might be getting ``_propagate_attrs`` from it. So we implement ``_propagate_attrs`` on ``PropComparator`` as well, since this is easy to define. Fixes: #6558 Change-Id: If781bf844e7e3d3b0841aff1c3668e9d6af9f097