[Bug]: gpt2 输出只有！

[G1017]

Your current environment

The output of `python collect_env.py`

Your output of `python collect_env.py` here

Model Input Dumps

No response

🐛 Describe the bug

python3 -m vllm.entrypoints.openai.api_server --mo
del /models/openai/gpt2 --host 127.0.0.1 --port 12345

curl 127.0.0.1:12345/v1/completions
-H "Content-Type: application/json"
-d '{"model":"/share/fshare/common/models/openai/gpt2",
"prompt":"hello. ",
"temperature":0.7,
"max_tokens":128}'

output's text only "!",not correct answer.

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[DarkLight1337]

Which version of vLLM are you using? Can you show the output of collect_env.py? Please also link the HF repo you downloaded the model from.