From f6597e46a8c3ddfedfb27e4204179556f972320b Mon Sep 17 00:00:00 2001
From: Bernie Hackett <bernie@10gen.com>
Date: Mon, 27 Oct 2014 18:04:53 -0700
Subject: [PATCH] PYTHON-644 - Restore dict.copy() to avoid Jython issues.

---
 pymongo/common.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/pymongo/common.py b/pymongo/common.py
index 7e3ddaaa9..9341ed99c 100644
--- a/pymongo/common.py
+++ b/pymongo/common.py
@@ -709,7 +709,7 @@ class BaseObject(object):
         if safe is not None or options:
             if safe or options:
                 if not options:
-                    options = self.__write_concern
+                    options = self.__write_concern.copy()
                     # Backwards compatability edge case. Call getLastError
                     # with no options if safe=True was passed but collection
                     # level defaults have been disabled with w=0.
@@ -727,6 +727,6 @@ class BaseObject(object):
         if self.__write_concern.get('w') == 0:
             return False, {}
         elif self.safe or self.__write_concern.get('w', 0) != 0:
-            return True, self.__write_concern
+            return True, self.__write_concern.copy()
 
         return False, {}