Update packages/proto-plus/proto/marshal/marshal.py

Author: chalmerlowe

packages/proto-plus/proto/marshal/marshal.py

@@ -265,7 +265,7 @@ def __new__(cls, *, name: str):
         """
         klass = cls._instances.get(name)
         if klass is None:
-            with cls._lock:
+            with cls._instance_creation_lock:
                 # Double check inside lock to confirm another thread hasn't
                 # created the instance while we were waiting for the lock.
                 klass = cls._instances.get(name)