Protect against attempts to replace PyNumber_Add with PyNumber_InPlaceAdd in builtin sum

bfd2dc74 · Mark Dickinson · a0e0f9ed · bfd2dc74
Commit bfd2dc74 authored Oct 17, 2009 by Mark Dickinson
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Lib/test/test_builtin.py Lib/test/test_builtin.py +4 -0

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--- a/Lib/test/test_builtin.py
+++ b/Lib/test/test_builtin.py
@@ -1286,6 +1286,10 @@ 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(()))