From 1f9e6017653596775e4fd582a7f4d64ac86eb8bc Mon Sep 17 00:00:00 2001
From: Zachary Ware <zachary.ware@gmail.com>
Date: Wed, 19 Feb 2014 10:44:47 -0600
Subject: [PATCH] Issue #20510: Confirm that the code attribute of the
 SystemExit exception raised by sys.exit is None when no code is given.

As suggested by Serhiy Storchaka.
---
 Lib/test/test_sys.py | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Lib/test/test_sys.py b/Lib/test/test_sys.py
index 491ae9ce3ef..f768e9b7c3a 100644
--- a/Lib/test/test_sys.py
+++ b/Lib/test/test_sys.py
@@ -91,6 +91,10 @@ class SysModuleTest(unittest.TestCase):
         self.assertRaises(TypeError, sys.exit, 42, 42)
 
         # call without argument
+        with self.assertRaises(SystemExit) as cm:
+            sys.exit()
+        self.assertIsNone(cm.exception.code)
+
         rc, out, err = assert_python_ok('-c', 'import sys; sys.exit()')
         self.assertEqual(rc, 0)
         self.assertEqual(out, b'')