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gh-142414: Remove singleton design pattern in Lib/concurrent/interpreters/_crossinterp.py. #142577

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gh-142414: Remove singleton design pattern in Lib/concurrent/interpreters/_crossinterp.py. #142577

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d5060f7
Add register_unbound in _crossinterp.py and initialize it in _queues.py
note35 Dec 10, 2025
fb22cf6
Change to directly import UNBOUND.
note35 Dec 10, 2025
7c3245f
📜🤖 Added by blurb_it.
blurb-it[bot] Dec 10, 2025
32617a0
Update 2025-12-10-15-27-58.gh-issue-142414.zTHgP-.rst
note35 Dec 10, 2025
5730fd5
Update 2025-12-10-15-27-58.gh-issue-142414.zTHgP-.rst
note35 Dec 10, 2025
fcb3385
Add the repro test into test_queues.py.
note35 Dec 11, 2025
9a85aad
Address "./python -m test test_interpreters test_concurrent_futures.t…
note35 Dec 11, 2025
4a7e0ee
Update Misc/NEWS.d/next/Library/2025-12-10-15-27-58.gh-issue-142414.z…
note35 Dec 11, 2025
b6a206f
Remove picklable functions.
note35 Dec 11, 2025
b128769
Convert singleton object to a normal object.
note35 Dec 11, 2025
f74dcf9
Remove test_cross_interpreter_unbound_identity and picklabe object.
note35 Dec 12, 2025
d08f96e
Update Misc/NEWS.d/next/Library/2025-12-10-15-27-58.gh-issue-142414.z…
note35 Dec 12, 2025
2534bbf
Add a comment to explain why catch queues.QueueEmpty
note35 Dec 12, 2025
abb3dfe
Update Misc/NEWS.d/next/Library/2025-12-10-15-27-58.gh-issue-142414.z…
note35 Dec 12, 2025
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Add the repro test into test_queues.py.
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@note35
note35 committed Dec 11, 2025
commit fcb33853a7151d6fdb0e2a867215dae3a140c257
9 changes: 9 additions & 0 deletions Lib/test/test_interpreters/test_queues.py
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Original file line number Diff line number Diff line change
Expand Up @@ -8,6 +8,7 @@
# Raise SkipTest if subinterpreters not supported.
_queues = import_helper.import_module('_interpqueues')
from concurrent import interpreters
from concurrent.futures import InterpreterPoolExecutor
from concurrent.interpreters import _queues as queues, _crossinterp
from .utils import _run_output, TestBase as _TestBase

Expand Down Expand Up @@ -93,6 +94,14 @@ def test_bind_release(self):
with self.assertRaises(queues.QueueError):
_queues.release(qid)

def test_interpreter_pool_executor_after_reload(self):
# Regression test for gh-142414 (KeyError in serialize_unbound).
importlib.reload(queues)
code = "import struct"
with InterpreterPoolExecutor(max_workers=1) as executor:
results = executor.map(exec, [code] * 1)
self.assertEqual(list(results), [None] * 1)


class QueueTests(TestBase):

Expand Down
2 changes: 1 addition & 1 deletion Misc/NEWS.d/next/Library/2025-12-10-15-27-58.gh-issue-142414.zTHgP-.rst
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@@ -1 +1 @@
Unified the UNBOUND constant in the internal implementation of Lib/concurrent/interpreters.
Fix spurious KeyError when concurrent.interpreters is reloaded after import.
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