[BUG] RuntimeError: Unexpected model output: 26239

Describe the bug

输入:
import bminf
cpm2 = bminf.models.CPM2()
result = cpm2.fill_blank("有一个服装品牌叫做<span>专门设计彩绘T恤",
top_p=0.5,
top_n=5,
temperature=0.5,
frequency_penalty=0,
presence_penalty=0
)

报错信息:
Traceback (most recent call last):
File "/usr/local/lib/python3.6/dist-packages/IPython/core/interactiveshell.py", line 3331, in run_code
exec(code_obj, self.user_global_ns, self.user_ns)
File "", line 6, in
presence_penalty=0
File "/usr/local/lib/python3.6/dist-packages/bminf/models/cpm2.py", line 252, in fill_blank
raise RuntimeError("Unexpected model output: %d" % token)
RuntimeError: Unexpected model output: 26239

请帮忙看看是什么原因

Environment:
python3.6
torch1.8.1

Start by reproducing the provided CPM2.fill_blank call in bminf/models/cpm2.py with Python 3.6 and torch 1.8.1. Inspect the handling around line 252, where token 26239 raises RuntimeError, and compare the returned token with the model's expected output. Done means the cause is confirmed and the behavior is covered by a regression test.