From 04fbb9e63c098dd2de40b545eed210dfd93893ce Mon Sep 17 00:00:00 2001
From: Mike Bayer <mike_mp@zzzcomputing.com>
Date: Fri, 27 Dec 2019 15:02:31 -0500
Subject: Test for short term reference cycles and resolve as many as possible

Added test support and repaired a wide variety of unnecessary reference
cycles created for short-lived objects, mostly in the area of ORM queries.

Fixes: #5056
Change-Id: Ifd93856eba550483f95f9ae63d49f36ab068b85a
---
 lib/sqlalchemy/orm/query.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'lib/sqlalchemy/orm/query.py')

diff --git a/lib/sqlalchemy/orm/query.py b/lib/sqlalchemy/orm/query.py
index 80d544068..6e7d7aabd 100644
--- a/lib/sqlalchemy/orm/query.py
+++ b/lib/sqlalchemy/orm/query.py
@@ -2235,7 +2235,7 @@ class Query(Generative):
         while "prev" in jp:
             f, prev = jp["prev"]
             prev = prev.copy()
-            prev[f] = jp
+            prev[f] = jp.copy()
             jp["prev"] = (f, prev)
             jp = prev
         self._joinpath = jp
-- 
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