Correct index in script

examples/run_lm_finetuning.py

@@ -150,7 +150,7 @@ def mask_tokens(inputs, tokenizer, args):
     special_tokens_mask = [tokenizer.get_special_tokens_mask(val, already_has_special_tokens=True) for val in labels.tolist()]
     probability_matrix.masked_fill_(torch.tensor(special_tokens_mask, dtype=torch.bool), value=0.0)
     masked_indices = torch.bernoulli(probability_matrix).bool()
-    labels[~masked_indices] = -1  # We only compute loss on masked tokens
+    labels[~masked_indices] = -100  # We only compute loss on masked tokens
 
     # 80% of the time, we replace masked input tokens with tokenizer.mask_token ([MASK])
     indices_replaced = torch.bernoulli(torch.full(labels.shape, 0.8)).bool() & masked_indices