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Propagate MemoryError from pool callbacks #451

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Merged
auvipy merged 1 commit into from
Aug 13, 2026
Merged

Propagate MemoryError from pool callbacks #451

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2 changes: 2 additions & 0 deletions billiard/pool.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1797,6 +1797,8 @@ def safe_apply_callback(self, fun, *args, **kwargs):
if fun:
try:
fun(*args, **kwargs)
except MemoryError:
raise
except self._callbacks_propagate:
raise
except Exception as exc:
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9 changes: 9 additions & 0 deletions t/unit/test_pool.py
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Expand Up @@ -19,6 +19,15 @@ def simple_task(x):
return x * 2

class test_pool:
def test_memory_error_from_callback_propagates(self):
def callback(value):
raise MemoryError(value)

result = billiard.pool.ApplyResult({}, callback)

with pytest.raises(MemoryError, match='out of memory'):
result._set(None, (True, 'out of memory'))

def test_raises(self):
pool = billiard.pool.Pool()
assert pool.did_start_ok() is True
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