[CI] Fix tests/distributed/test_ca_buffer_sharing.py (#22849)

Signed-off-by: ilmarkov <[email protected]>
Co-authored-by: ilmarkov <[email protected]>
Co-authored-by: Wentao Ye <[email protected]>

Author: 3 people

vllm/distributed/device_communicators/custom_all_reduce.py

@@ -297,7 +297,7 @@ def create_shared_buffer(size_in_bytes: int,
     @staticmethod
     def free_shared_buffer(pointers: list[int],
                            group: Optional[ProcessGroup] = None,
-                           rank: Optional[int] = 0) -> None:
+                           rank: Optional[int] = None) -> None:
         if rank is None:
             rank = dist.get_rank(group=group)
         if ops is not None: