text: Title: [Bug] Min new tokens error
  Body: ### Checklist
  
  - [x] 1. I have searched related issues but cannot get the expected help.
  - [x] 2. The bug has not been fixed in the latest version.
  - [x] 3. Please note that if the bug-related issue you submitted lacks corresponding environment info and a minimal reproducible demo, it will be challenging for us to reproduce and resolve the issue, reducing the likelihood of receiving feedback.
  - [x] 4. If the issue you raised is not a bug but a question, please raise a discussion at https://github.com/sgl-project/sglang/discussions/new/choose Otherwise, it will be closed.
  - [x] 5. Please use English, otherwise it will be closed.
  
  ### Describe the bug
  
  Running this file, /sglang/test/srt/sampling/penaltylib/penalizers/test_min_new_tokens.py
  
  There is error. Please fix it.
  
  ### Reproduction
  
  NA
  
  ### Environment
  
  NA