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Issue #2537: Remove breaked check which prevented valid regular expressions.

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Patch by Meador Inge.

See also issue #18647.
This commit is contained in:
Serhiy Storchaka 2013-08-19 23:18:23 +03:00
parent 1ca66edbc5
commit 98985a1980
2 changed files with 10 additions and 2 deletions
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10
Lib/test/test_re.py
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@ -1051,6 +1051,16 @@ class ReTests(unittest.TestCase):
[b'xyz'], msg=pattern)
def test_bug_2537(self):
# issue 2537: empty submatches
for outer_op in ('{0,}', '*', '+', '{1,187}'):
for inner_op in ('{0,}', '*', '?'):
r = re.compile("^((x|y)%s)%s" % (inner_op, outer_op))
m = r.match("xyyzy")
self.assertEqual(m.group(0), "xyy")
self.assertEqual(m.group(1), "")
self.assertEqual(m.group(2), "y")
def run_re_tests():
from test.re_tests import tests, SUCCEED, FAIL, SYNTAX_ERROR
if verbose: