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gh-136421: Fix crash in _datetime when initialized/finalized concurrently #136620

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neonene wants to merge 11 commits into from
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gh-136421: Fix crash in _datetime when initialized/finalized concurrently #136620

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neonene Jul 13, 2025
c9ad7fa
Add a test
neonene Jul 13, 2025
61f1faf
Tweak test
neonene Jul 13, 2025
df7ae54
ditto
neonene Jul 13, 2025
6976252
ditto
neonene Jul 13, 2025
7d85f55
ditto
neonene Jul 13, 2025
3a6f844
Fix crash
neonene Jul 13, 2025
c3b3a35
Make test less expensive
neonene Jul 13, 2025
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neonene Jul 14, 2025
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neonene Jul 14, 2025
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neonene Jul 15, 2025
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ditto
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@neonene
neonene authored Jul 13, 2025
commit 7d85f55d0a2db84fc64d6e40cc051438854e629f
28 changes: 11 additions & 17 deletions Lib/test/datetimetester.py
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Expand Up @@ -7300,23 +7300,17 @@ def test_update_type_cache(self):
def test_static_type_concurrent_init_fini(self):
# gh-136421
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script = textwrap.dedent("""
import threading
import _interpreters

def run(id):
_interpreters.exec(id, "import _datetime; print('a', end='')")
_interpreters.destroy(id)

ids = [_interpreters.create() for i in range(20)]
ts = [threading.Thread(target=run, args=(id,)) for id in ids]
for t in ts:
t.start()
for t in ts:
t.join()
""")
_, out, err = script_helper.assert_python_ok('-c', script)
self.assertEqual(out, b'a' * 20)
self.assertEqual(err, b'')
from concurrent.futures import InterpreterPoolExecutor
def func():
import _datetime
print('a', end='')
with InterpreterPoolExecutor(max_workers=10) as executor:
for _ in range(10):
executor.submit(func)
""")
res = script_helper.assert_python_ok("-c", script)
self.assertEqual(res.out, b'a' * 10)
self.assertEqual(res.err, b'')


def load_tests(loader, standard_tests, pattern):
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