Precise Debugging Benchmark: Is Your Model Debugging or Regenerating?
Unlike code completion, debugging requires localizing faults and applying targeted edits. We observe that frontier LLMs often regenerate correct but over-edited solutions during debugging. To evaluate how far LLMs are from precise debugging, we introduce the Precise Debugging Benchmark (PDB) framework, which automatically converts any coding dataset into a debugging benchmark with precision-aware evaluation. PDB generates buggy programs by synthesizing verified atomic bugs and composing them into multi-bug programs. We define two novel metrics, edit-level precision and bug-level recall, which measure how many necessary edits are made and how many bugs are resolved. We release two evaluati...
| Authors | Miaosen Chai, Wang Bill Zhu, Shangshang Wang et al. |
|---|---|
| Primary category | cs.SE |
| Published | 19 April 2026 |
| Last updated at source | 5 October 2026 |
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