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| author | Serhiy Storchaka <storchaka@gmail.com> | 2013-02-16 19:23:53 (GMT) |
|---|---|---|
| committer | Serhiy Storchaka <storchaka@gmail.com> | 2013-02-16 19:23:53 (GMT) |
| commit | fa4681691591429466d18e21d7640e3703ab7f28 (patch) | |
| tree | 91ef35df8dbbfcf6cab1a0ce75e4495dcdf2f826 /Lib/test/test_re.py | |
| parent | 70ca0210e8958d2665541ddd38fce2965075674e (diff) | |
| download | cpython-fa4681691591429466d18e21d7640e3703ab7f28.zip cpython-fa4681691591429466d18e21d7640e3703ab7f28.tar.gz cpython-fa4681691591429466d18e21d7640e3703ab7f28.tar.bz2 | |
Issue #9669: Protect re against infinite loops on zero-width matching in
non-greedy repeat. Patch by Matthew Barnett.
Diffstat (limited to 'Lib/test/test_re.py')
| -rw-r--r-- | Lib/test/test_re.py | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/Lib/test/test_re.py b/Lib/test/test_re.py index f7e76dc..0c95f4e 100644 --- a/Lib/test/test_re.py +++ b/Lib/test/test_re.py @@ -616,6 +616,15 @@ class ReTests(unittest.TestCase): self.assertEqual(re.match('(x)*y', 50000*'x'+'y').group(1), 'x') self.assertEqual(re.match('(x)*?y', 50000*'x'+'y').group(1), 'x') + def test_unlimited_zero_width_repeat(self): + # Issue #9669 + self.assertIsNone(re.match(r'(?:a?)*y', 'z')) + self.assertIsNone(re.match(r'(?:a?)+y', 'z')) + self.assertIsNone(re.match(r'(?:a?){2,}y', 'z')) + self.assertIsNone(re.match(r'(?:a?)*?y', 'z')) + self.assertIsNone(re.match(r'(?:a?)+?y', 'z')) + self.assertIsNone(re.match(r'(?:a?){2,}?y', 'z')) + def test_scanner(self): def s_ident(scanner, token): return token def s_operator(scanner, token): return "op%s" % token |