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reject SemLock reduce #6738

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Merged
youknowone merged 1 commit into from
Jan 16, 2026
Merged

reject SemLock reduce #6738

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8 changes: 0 additions & 8 deletions Lib/test/test_concurrent_futures/test_process_pool.py
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Expand Up @@ -228,13 +228,5 @@ def mock_start_new_thread(func, *args, **kwargs):
def setUpModule():
setup_module()

class ProcessPoolSpawnProcessPoolExecutorTest(ProcessPoolSpawnProcessPoolExecutorTest): # TODO: RUSTPYTHON
@unittest.skipIf(sys.platform == 'linux', "TODO: RUSTPYTHON flaky")
def test_saturation(self): super().test_saturation() # TODO: RUSTPYTHON

class ProcessPoolForkProcessPoolExecutorTest(ProcessPoolForkProcessPoolExecutorTest): # TODO: RUSTPYTHON
@unittest.skipIf(sys.platform == 'linux', "TODO: RUSTPYTHON flaky")
def test_ressources_gced_in_workers(self): super().test_ressources_gced_in_workers() # TODO: RUSTPYTHON

if __name__ == "__main__":
unittest.main()
7 changes: 7 additions & 0 deletions crates/stdlib/src/multiprocessing.rs
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Expand Up @@ -547,6 +547,13 @@ mod _multiprocessing {
self.last_tid.store(0, Ordering::Release);
}

/// SemLock objects cannot be pickled directly.
/// Use multiprocessing.synchronize.SemLock wrapper which handles pickling.
#[pymethod]
fn __reduce__(&self, vm: &VirtualMachine) -> PyResult {
Err(vm.new_type_error("cannot pickle 'SemLock' object".to_owned()))
}

/// Num of `acquire()`s minus num of `release()`s for this process.
// _multiprocessing_SemLock__count_impl
#[pymethod]
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