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gh-153141: Fix mutable default argument in _SharedMemoryTracker.__init__ #153142

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Merged
gpshead merged 1 commit into from
Jul 5, 2026
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gh-153141: Fix mutable default argument in _SharedMemoryTracker.__init__ #153142

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4 changes: 2 additions & 2 deletions Lib/multiprocessing/managers.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1294,9 +1294,9 @@ class SyncManager(BaseManager):
class _SharedMemoryTracker:
"Manages one or more shared memory segments."

def __init__(self, name, segment_names=[]):
def __init__(self, name, segment_names=None):
self.shared_memory_context_name = name
self.segment_names = segment_names
self.segment_names = [] if segment_names is None else segment_names

def register_segment(self, segment_name):
"Adds the supplied shared memory block name to tracker."
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