there is a endless loop in convert_tokens_to_ids(self.unk_token) and self._convert_token_to_id_with_added_voc(tokens)

[2018211801]

hi,this is part of my error information,thanks!

File "/mnt/data/wxc/workspace/Llama-X/src/transformers/src/transformers/tokenization_utils_fast.py", line 257, in _convert_token_to_id_with_added_voc
return self.unk_token_id
File "/mnt/data/wxc/workspace/Llama-X/src/transformers/src/transformers/tokenization_utils_base.py", line 1150, in unk_token_id
return self.convert_tokens_to_ids(self.unk_token)
File "/mnt/data/wxc/workspace/Llama-X/src/transformers/src/transformers/tokenization_utils_fast.py", line 250, in convert_tokens_to_ids
return self._convert_token_to_id_with_added_voc(tokens)