Fix meta_data handling in MonaiBundleInferenceOperator to ensure it defaults to an empty dict

Signed-off-by: Simone Bendazzoli <[email protected]>

Author: SimoneBendazzoli93

monai/deploy/operators/monai_bundle_inference_operator.py

@@ -577,6 +577,7 @@ def compute(self, op_input, op_output, context):
                 # value: NdarrayOrTensor  # MyPy complaints
                 value, meta_data = self._receive_input(name, op_input, context)
                 value = convert_to_dst_type(value, dst=value)[0]
+                meta_data = meta_data or {}
                 if not isinstance(meta_data, dict):
                     raise ValueError("`meta_data` must be a dict.")
                 value = MetaTensor.ensure_torch_and_prune_meta(value, meta_data)