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Issue #27066: Fixed SystemError if a custom opener (for open()) returns

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a negative number without setting an exception.
This commit is contained in:
Barry Warsaw 2016-06-08 17:47:26 -04:00
parent fda4d67842
commit 480e28538d
3 changed files with 25 additions and 1 deletions
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16
Lib/test/test_io.py
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@ -805,6 +805,22 @@ class IOTest(unittest.TestCase):
with self.open("non-existent", "r", opener=opener) as f:
self.assertEqual(f.read(), "egg\n")
def test_bad_opener_negative_1(self):
# Issue #27066.
def badopener(fname, flags):
return -1
with self.assertRaises(ValueError) as cm:
open('non-existent', 'r', opener=badopener)
self.assertEqual(str(cm.exception), 'opener returned -1')
def test_bad_opener_other_negative(self):
# Issue #27066.
def badopener(fname, flags):
return -2
with self.assertRaises(ValueError) as cm:
open('non-existent', 'r', opener=badopener)
self.assertEqual(str(cm.exception), 'opener returned -2')
def test_fileio_closefd(self):
# Issue #4841
with self.open(__file__, 'rb') as f1, \