8000 gh-123378: fix a crash in `UnicodeError.__str__` by picnixz · Pull Request #124935 · python/cpython · GitHub
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gh-123378: fix a crash in UnicodeError.__str__ #124935

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Merged
merged 11 commits into from
Oct 8, 2024
Merged

gh-123378: fix a crash in UnicodeError.__str__ #124935

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a9b1c0c
fix OOB in `UnicodeError.__str__`
picnixz Oct 3, 2024
3567426
blurb
picnixz Oct 3, 2024
43141c0
add tests
picnixz Oct 3, 2024
0c61375
small fixup
picnixz Oct 3, 2024
80287f6
Fix Windows compilation
picnixz Oct 3, 2024
7bbc0f5
improve test coverage
picnixz Oct 4, 2024
2313cd1
fix `UnicodeTranslateError`
picnixz Oct 4, 2024
a27a88b
improve test coverage
picnixz Oct 4, 2024
360c1a5
revert cosmetic changes
picnixz Oct 5, 2024
85199f8
add back PEP-7 braces
picnixz Oct 7, 2024
44dfaeb
address Victor's review
picnixz Oct 8, 2024
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address Victor's review
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@picnixz
picnixz committed Oct 8, 2024
commit 44dfaeb960454266cc2e96c01d05f2bc6325a673
23 changes: 13 additions & 10 deletions Lib/test/test_exceptions.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1337,25 +1337,28 @@ def test_unicode_errors_no_object(self):
for klass in klasses:
self.assertEqual(str(klass.__new__(klass)), "")

def test_unicode_error_str_gh_123378(self):
for formatter, start, end, obj in product(
(str, repr),
def test_unicode_error_str_does_not_crash(self):
# Test that str(UnicodeError(...)) does not crash.
# See https://github.com/python/cpython/issues/123378.

for start, end, objlen in product(
range(-5, 5),
range(-5, 5),
('', 'a', '123', '1234', '12345', 'abc123'),
range(7),
):
with self.subTest(formatter, obj=obj, start=start, end=end):
obj = 'a' * objlen
with self.subTest('encode', objlen=objlen, start=start, end=end):
exc = UnicodeEncodeError('utf-8', obj, start, end, '')
self.assertIsInstance(formatter(exc), str)
self.assertIsInstance(str(exc), str)

with self.subTest(formatter, obj=obj, start=start, end=end):
with self.subTest('translate', objlen=objlen, start=start, end=end):
exc = UnicodeTranslateError(obj, start, end, '')
self.assertIsInstance(formatter(exc), str)
self.assertIsInstance(str(exc), str)

encoded = obj.encode()
with self.subTest(formatter, obj=encoded, start=start, end=end):
with self.subTest('decode', objlen=objlen, start=start, end=end):
exc = UnicodeDecodeError('utf-8', encoded, start, end, '')
self.assertIsInstance(formatter(exc), str)
self.assertIsInstance(str(exc), str)

@no_tracing
def test_badisinstance(self):
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