Update modeling.py (#5)

- Update modeling.py (d0284a3c6268d1484dd3b5398dfce7b32a51724e)


Co-authored-by: Xin Zhang <izhx@users.noreply.huggingface.co>

modeling.py

@@ -975,8 +975,6 @@ class NewForMaskedLM(NewPreTrainedModel):
         self.lm_head = NewLMPredictionHead(config)
         self.loss_fct = nn.CrossEntropyLoss()
 
-        self.pretraining = True
-
         # Initialize weights and apply final processing
         self.post_init()
 
@@ -1009,13 +1007,13 @@ class NewForMaskedLM(NewPreTrainedModel):
 
         return_dict = return_dict if return_dict is not None else self.config.use_return_dict
 
-        if labels is None:
+        if labels is None or not self.new.config.unpad_inputs:
             length = None
             subset_indices = None
         else:
             length = attention_mask.sum(-1).tolist()
             labels = labels[attention_mask.bool()].unsqueeze(0)
-            subset_indices = labels > -100 if self.pretraining else None
+            subset_indices = labels > -100
 
         outputs = self.new(
             input_ids,
@@ -1037,7 +1035,12 @@ class NewForMaskedLM(NewPreTrainedModel):
 
         masked_lm_loss = None
         if labels is not None:
-            labels = labels[subset_indices]
+            if subset_indices is None:
+                mask = attention_mask.bool()
+                prediction_scores = prediction_scores[mask]
+                labels = labels[mask]
+            else:
+                labels = labels[subset_indices]
             masked_lm_loss = self.loss_fct(prediction_scores, labels)
 
         if not return_dict: