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gh-92336: linecache.getline should not raise exceptions on decoding errors (GH-94410)

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Irit Katriel 2022-06-30 10:18:18 +01:00 committed by GitHub
parent 68fb03249f
commit 21cbdae90f
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3 changed files with 8 additions and 7 deletions
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2
Lib/linecache.py
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@ -135,7 +135,7 @@ def updatecache(filename, module_globals=None):
try:
with tokenize.open(fullname) as fp:
lines = fp.readlines()
except OSError:
except (OSError, UnicodeDecodeError, SyntaxError):
return []
if lines and not lines[-1].endswith('\n'):
lines[-1] += '\n'

12
Lib/test/test_linecache.py
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@ -73,12 +73,10 @@ class GetLineTestsBadData(TempFile):
# file_byte_string = b'Bad data goes here'
def test_getline(self):
self.assertRaises((SyntaxError, UnicodeDecodeError),
linecache.getline, self.file_name, 1)
self.assertEqual(linecache.getline(self.file_name, 1), '')
def test_getlines(self):
self.assertRaises((SyntaxError, UnicodeDecodeError),
linecache.getlines, self.file_name)
self.assertEqual(linecache.getlines(self.file_name), [])
class EmptyFile(GetLineTestsGoodData, unittest.TestCase):
@ -92,9 +90,11 @@ class SingleEmptyLine(GetLineTestsGoodData, unittest.TestCase):
class GoodUnicode(GetLineTestsGoodData, unittest.TestCase):
file_list = ['á\n', 'b\n', 'abcdef\n', 'ááááá\n']
class BadUnicode_NoDeclaration(GetLineTestsBadData, unittest.TestCase):
file_byte_string = b'\n\x80abc'
class BadUnicode(GetLineTestsBadData, unittest.TestCase):
file_byte_string = b'\x80abc'
class BadUnicode_WithDeclaration(GetLineTestsBadData, unittest.TestCase):
file_byte_string = b'# coding=utf-8\n\x80abc'
class LineCacheTests(unittest.TestCase):

1
Misc/NEWS.d/next/Library/2022-06-29-09-48-37.gh-issue-92336.otA6c6.rst Normal file
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@ -0,0 +1 @@
Fix bug where :meth:`linecache.getline` fails on bad files with :exc:`UnicodeDecodeError` or :exc:`SyntaxError`. It now returns an empty string as per the documentation.