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bpo-38031: Fix a possible assertion failure in _io.FileIO() (GH-GH-5688)

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(cherry picked from commit d386115039)

Co-authored-by: Zackery Spytz <zspytz@gmail.com>
This commit is contained in:
Miss Islington (bot) 2022-11-25 05:20:00 -08:00 • committed by GitHub
parent 5b7408490f
commit c06f74f1d6
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3 changed files with 15 additions and 1 deletions
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8
Lib/test/test_io.py
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@ -888,6 +888,14 @@ class IOTest(unittest.TestCase):
open('non-existent', 'r', opener=badopener)
self.assertEqual(str(cm.exception), 'opener returned -2')
def test_opener_invalid_fd(self):
# Check that OSError is raised with error code EBADF if the
# opener returns an invalid file descriptor (see gh-82212).
fd = os_helper.make_bad_fd()
with self.assertRaises(OSError) as cm:
self.open('foo', opener=lambda name, flags: fd)
self.assertEqual(cm.exception.errno, errno.EBADF)
def test_fileio_closefd(self):
# Issue #4841
with self.open(__file__, 'rb') as f1, \