From 36e585bdbfd50ed0c686ef5b3183db1597cfa8c1 Mon Sep 17 00:00:00 2001
From: Shane Harvey <shnhrv@gmail.com>
Date: Wed, 29 Nov 2017 12:34:04 -0800
Subject: [PATCH] PYTHON-1427 Always initialize Cursor attributes used in
 __del__.

Prevents attribute errors during garbage collection.
---
 pymongo/cursor.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/pymongo/cursor.py b/pymongo/cursor.py
index 2c50e3d8b..b995050f6 100644
--- a/pymongo/cursor.py
+++ b/pymongo/cursor.py
@@ -124,9 +124,12 @@ class Cursor(object):
 
         .. mongodoc:: cursors
         """
+        # Initialize all attributes used in __del__ before possibly raising
+        # an error to avoid attribute errors during garbage collection.
         self.__id = None
         self.__exhaust = False
         self.__exhaust_mgr = None
+        self.__killed = False
 
         if session:
             self.__session = session
@@ -206,7 +209,6 @@ class Cursor(object):
         self.__data = deque()
         self.__address = None
         self.__retrieved = 0
-        self.__killed = False
 
         self.__codec_options = collection.codec_options
         self.__read_preference = collection.read_preference