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-rw-r--r--lib/sqlalchemy/orm/session.py1
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/sqlalchemy/orm/session.py b/lib/sqlalchemy/orm/session.py
index ba1a38bb9..a3714bc7e 100644
--- a/lib/sqlalchemy/orm/session.py
+++ b/lib/sqlalchemy/orm/session.py
@@ -1136,6 +1136,7 @@ class Session(object):
# grab the cascades before adding the item to the deleted list
# so that autoflush does not delete the item
+ # the strong reference to the instance itself is significant here
cascade_states = list(_cascade_state_iterator('delete', state))
self._deleted[state] = state.obj()