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GH-83658: make multiprocessing.Pool raise an exception if maxtasksperchild is not None or a positive int (GH-93364) (GH-93924)

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Closes GH-83658.
(cherry picked from commit e37a158725)

Co-authored-by: Irit Katriel <1055913+iritkatriel@users.noreply.github.com>

Co-authored-by: Irit Katriel <1055913+iritkatriel@users.noreply.github.com>
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Miss Islington (bot) 2022-06-17 15:32:15 -07:00 • committed by GitHub
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Lib/test/_test_multiprocessing.py
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@ -2805,6 +2805,11 @@ class _TestPoolWorkerLifetime(BaseTestCase):
for (j, res) in enumerate(results):
self.assertEqual(res.get(), sqr(j))
def test_pool_maxtasksperchild_invalid(self):
for value in [0, -1, 0.5, "12"]:
with self.assertRaises(ValueError):
multiprocessing.Pool(3, maxtasksperchild=value)
def test_worker_finalization_via_atexit_handler_of_multiprocessing(self):
# tests cases against bpo-38744 and bpo-39360
cmd = '''if 1: