Set pad_token in run_glue_no_trainer.py #28534 (#30234)

examples/pytorch/text-classification/run_glue_no_trainer.py

@@ -327,6 +327,9 @@ def main():
     tokenizer = AutoTokenizer.from_pretrained(
         args.model_name_or_path, use_fast=not args.use_slow_tokenizer, trust_remote_code=args.trust_remote_code
     )
+    if tokenizer.pad_token is None:
+        tokenizer.pad_token = tokenizer.eos_token
+    config.pad_token_id = tokenizer.pad_token_id
     model = AutoModelForSequenceClassification.from_pretrained(
         args.model_name_or_path,
         from_tf=bool(".ckpt" in args.model_name_or_path),