From: Mark Dickinson <dickinsm@gmail.com>
Date: Sat, 17 Oct 2009 21:48:16 +0000 (+0000)
Subject: Merged revisions 75470 via svnmerge from
X-Git-Tag: v3.2a1~2386
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=3a22b476a39f648b845111699c4724963f5379a9;p=python

Merged revisions 75470 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk

........
  r75470 | mark.dickinson | 2009-10-17 22:46:32 +0100 (Sat, 17 Oct 2009) | 1 line

  Protect against attempts to replace PyNumber_Add with PyNumber_InPlaceAdd in builtin sum
........
---

diff --git a/Lib/test/test_builtin.py b/Lib/test/test_builtin.py
index cac4555da1..b3ae319073 100644
--- a/Lib/test/test_builtin.py
+++ b/Lib/test/test_builtin.py
@@ -1151,6 +1151,10 @@ class BuiltinTest(unittest.TestCase):
                 raise ValueError
         self.assertRaises(ValueError, sum, BadSeq())
 
+        empty = []
+        sum(([x] for x in range(10)), empty)
+        self.assertEqual(empty, [])
+
     def test_type(self):
         self.assertEqual(type(''),  type('123'))
         self.assertNotEqual(type(''), type(()))