From ec99568ce4e9379aff022a2d199c98bd4a3695c5 Mon Sep 17 00:00:00 2001
From: Benjamin Peterson <benjamin@python.org>
Date: Tue, 19 Aug 2008 14:32:56 +0000
Subject: [PATCH] fix possible error

---
 Lib/test/test_threading.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/Lib/test/test_threading.py b/Lib/test/test_threading.py
index d0316073cb5..c6a5cf49d2a 100644
--- a/Lib/test/test_threading.py
+++ b/Lib/test/test_threading.py
@@ -329,7 +329,10 @@ class ThreadTests(unittest.TestCase):
 
         t = threading.Thread()
         with catch_warning() as w:
-            del threading.__warningregistry__
+            try:
+                del threading.__warningregistry__
+            except AttributeError:
+                pass
             msg = "isDaemon() is deprecated in favor of the " \
                   "Thread.daemon property"
             check(t.isDaemon(), w, msg)