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[3.11] gh-98783: Fix crashes when str subclasses are used in _PyUnicode_Equal (GH-98806) (#98871)

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* gh-98783: Fix crashes when `str` subclasses are used in `_PyUnicode_Equal` (GH-98806)
(cherry picked from commit 76f989dc3e)

Co-authored-by: Nikita Sobolev <mail@sobolevn.me>
This commit is contained in:
Dennis Sweeney 2022-10-30 14:30:08 -04:00 • committed by GitHub
parent a55bd6f884
commit 5efe2eead3
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GPG key ID: 4AEE18F83AFDEB23
4 changed files with 35 additions and 2 deletions
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12
Lib/test/test_long.py
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@ -1334,6 +1334,12 @@ class LongTest(unittest.TestCase):
b'\xff\xff\xff\xff\xff')
self.assertRaises(OverflowError, (1).to_bytes, 0, 'big')
# gh-98783
class SubStr(str):
pass
self.assertEqual((0).to_bytes(1, SubStr('big')), b'\x00')
self.assertEqual((0).to_bytes(0, SubStr('little')), b'')
def test_from_bytes(self):
def check(tests, byteorder, signed=False):
def equivalent_python(byte_array, byteorder, signed=False):
@ -1534,6 +1540,12 @@ class LongTest(unittest.TestCase):
self.assertRaises(TypeError, int.from_bytes, MissingBytes())
self.assertRaises(ZeroDivisionError, int.from_bytes, RaisingBytes())
# gh-98783
class SubStr(str):
pass
self.assertEqual(int.from_bytes(b'', SubStr('big')), 0)
self.assertEqual(int.from_bytes(b'\x00', SubStr('little')), 0)
@support.cpython_only
def test_from_bytes_small(self):
# bpo-46361