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bpo-45030: Fix integer overflow in __reduce__ of the range iterator (GH-28000)

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It happened with fast range iterator  when the calculated stop = start + step * len
was out of the C long range.
(cherry picked from commit 936f6a16b9)

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
This commit is contained in:
Miss Islington (bot) 2021-09-04 13:39:30 -07:00 • committed by GitHub
parent 2ad114ddff
commit ed9f927527
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3 changed files with 27 additions and 18 deletions
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10
Lib/test/test_range.py
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@ -375,8 +375,14 @@ class RangeTest(unittest.TestCase):
def test_iterator_pickling(self):
testcases = [(13,), (0, 11), (-22, 10), (20, 3, -1), (13, 21, 3),
(-2, 2, 2), (2**31-3, 2**31-1), (2**33, 2**33+2),
(2**63-3, 2**63-1), (2**65, 2**65+2)]
(-2, 2, 2)]
for M in 2**31, 2**63:
testcases += [
(M-3, M-1), (4*M, 4*M+2),
(M-2, M-1, 2), (-M+1, -M, -2),
(1, 2, M-1), (-1, -2, -M),
(1, M-1, M-1), (-1, -M, -M),
]
for proto in range(pickle.HIGHEST_PROTOCOL + 1):
for t in testcases:
with self.subTest(proto=proto, t=t):