Issue #13169: The maximal repetition number in a regular expression has been
increased from 65534 to 2147483647 (on 32-bit platform) or 4294967294 (on
64-bit).
diff --git a/Lib/test/test_re.py b/Lib/test/test_re.py
index dee5efe..a9d6f2c 100644
--- a/Lib/test/test_re.py
+++ b/Lib/test/test_re.py
@@ -1,5 +1,5 @@
from test.test_support import verbose, run_unittest, import_module
-from test.test_support import precisionbigmemtest, _2G
+from test.test_support import precisionbigmemtest, _2G, cpython_only
import re
from re import Scanner
import sys
@@ -847,6 +847,37 @@
self.assertEqual(n, size + 1)
+ def test_repeat_minmax_overflow(self):
+ # Issue #13169
+ string = "x" * 100000
+ self.assertEqual(re.match(r".{65535}", string).span(), (0, 65535))
+ self.assertEqual(re.match(r".{,65535}", string).span(), (0, 65535))
+ self.assertEqual(re.match(r".{65535,}?", string).span(), (0, 65535))
+ self.assertEqual(re.match(r".{65536}", string).span(), (0, 65536))
+ self.assertEqual(re.match(r".{,65536}", string).span(), (0, 65536))
+ self.assertEqual(re.match(r".{65536,}?", string).span(), (0, 65536))
+ # 2**128 should be big enough to overflow both SRE_CODE and Py_ssize_t.
+ self.assertRaises(OverflowError, re.compile, r".{%d}" % 2**128)
+ self.assertRaises(OverflowError, re.compile, r".{,%d}" % 2**128)
+ self.assertRaises(OverflowError, re.compile, r".{%d,}?" % 2**128)
+ self.assertRaises(OverflowError, re.compile, r".{%d,%d}" % (2**129, 2**128))
+
+ @cpython_only
+ def test_repeat_minmax_overflow_maxrepeat(self):
+ try:
+ from _sre import MAXREPEAT
+ except ImportError:
+ self.skipTest('requires _sre.MAXREPEAT constant')
+ string = "x" * 100000
+ self.assertIsNone(re.match(r".{%d}" % (MAXREPEAT - 1), string))
+ self.assertEqual(re.match(r".{,%d}" % (MAXREPEAT - 1), string).span(),
+ (0, 100000))
+ self.assertIsNone(re.match(r".{%d,}?" % (MAXREPEAT - 1), string))
+ self.assertRaises(OverflowError, re.compile, r".{%d}" % MAXREPEAT)
+ self.assertRaises(OverflowError, re.compile, r".{,%d}" % MAXREPEAT)
+ self.assertRaises(OverflowError, re.compile, r".{%d,}?" % MAXREPEAT)
+
+
def run_re_tests():
from test.re_tests import tests, SUCCEED, FAIL, SYNTAX_ERROR
if verbose: