- Fixed bug where if an exception were thrown at the start of a

- Fixed bug where if an exception were thrown at the start of a
:class:`.Query` before it fetched results, particularly when
row processors can't be formed, the cursor would stay open with
results pending and not actually be closed.  This is typically only
an issue on an interpreter like Pypy where the cursor isn't
immediately GC'ed, and can in some circumstances lead to transactions/
locks being open longer than is desirable.
fixes #3285

Conflicts:
	lib/sqlalchemy/orm/loading.py