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Issue #17106: Fix a segmentation fault in io.TextIOWrapper when an underlying

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stream or a decoder produces data of an unexpected type (i.e. when
io.TextIOWrapper initialized with text stream or use bytes-to-bytes codec).
This commit is contained in:
Serhiy Storchaka 2013-02-03 17:07:32 +02:00
commit d03ce4ae3d
3 changed files with 76 additions and 28 deletions
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24
Lib/test/test_io.py
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@ -2542,6 +2542,30 @@ class TextIOWrapperTest(unittest.TestCase):
txt.write('5')
self.assertEqual(b''.join(raw._write_stack), b'123\n45')
def test_read_nonbytes(self):
# Issue #17106
# Crash when underlying read() returns non-bytes
t = self.TextIOWrapper(self.StringIO('a'))
self.assertRaises(TypeError, t.read, 1)
t = self.TextIOWrapper(self.StringIO('a'))
self.assertRaises(TypeError, t.readline)
t = self.TextIOWrapper(self.StringIO('a'))
self.assertRaises(TypeError, t.read)
def test_illegal_decoder(self):
# Issue #17106
# Crash when decoder returns non-string
t = self.TextIOWrapper(self.BytesIO(b'aaaaaa'), newline='\n',
encoding='quopri_codec')
self.assertRaises(TypeError, t.read, 1)
t = self.TextIOWrapper(self.BytesIO(b'aaaaaa'), newline='\n',
encoding='quopri_codec')
self.assertRaises(TypeError, t.readline)
t = self.TextIOWrapper(self.BytesIO(b'aaaaaa'), newline='\n',
encoding='quopri_codec')
self.assertRaises(TypeError, t.read)
class CTextIOWrapperTest(TextIOWrapperTest):
def test_initialization(self):