Fixed AttributeError when the regular expression starts from illegal escape.
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@ -211,6 +211,7 @@ class Tokenizer:
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string = str(string, 'latin1')
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self.decoded_string = string
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self.index = 0
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self.next = None
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self.__next()
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def __next(self):
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index = self.index
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@ -531,6 +531,20 @@ class ReTests(unittest.TestCase):
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self.assertEqual(re.search(br"\d\D\w\W\s\S",
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b"1aa! a", re.LOCALE).group(0), b"1aa! a")
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def test_other_escapes(self):
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self.assertRaises(re.error, re.compile, "\\")
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self.assertEqual(re.match(r"\(", '(').group(), '(')
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self.assertIsNone(re.match(r"\(", ')'))
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self.assertEqual(re.match(r"\\", '\\').group(), '\\')
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self.assertEqual(re.match(r"\y", 'y').group(), 'y')
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self.assertIsNone(re.match(r"\y", 'z'))
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self.assertEqual(re.match(r"[\]]", ']').group(), ']')
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self.assertIsNone(re.match(r"[\]]", '['))
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self.assertEqual(re.match(r"[a\-c]", '-').group(), '-')
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self.assertIsNone(re.match(r"[a\-c]", 'b'))
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self.assertEqual(re.match(r"[\^a]+", 'a^').group(), 'a^')
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self.assertIsNone(re.match(r"[\^a]+", 'b'))
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def test_string_boundaries(self):
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# See http://bugs.python.org/issue10713
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self.assertEqual(re.search(r"\b(abc)\b", "abc").group(1),
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