add bbox input validation (#26294)

src/transformers/models/bros/modeling_bros.py

@@ -877,6 +877,9 @@ class BrosModel(BrosPreTrainedModel):
         else:
             raise ValueError("You have to specify either input_ids or inputs_embeds")
 
+        if bbox is None:
+            raise ValueError("You have to specify bbox")
+
         batch_size, seq_length = input_shape
         device = input_ids.device if input_ids is not None else inputs_embeds.device
 
@@ -924,8 +927,6 @@ class BrosModel(BrosPreTrainedModel):
             past_key_values_length=past_key_values_length,
         )
 
-        bbox_position_embeddings = None
-        if bbox is not None:
         # if bbox has 2 points (4 float tensors) per token, convert it to 4 points (8 float tensors) per token
         if bbox.shape[-1] == 4:
             bbox = bbox[:, :, [0, 1, 2, 1, 2, 3, 0, 3]]