Validation Evidence in LLM Repair Agents: How Much of What Passes Actually Tests the Bug?
When a repair agent runs a test and sees it pass, the result is treated as evidence about the reported defect. We measure how often that treatment is warranted. BSG-VA (buggy-state/candidate-state/gold-fix validation analysis) captures each validation command at its exact working-tree state, extracts a test-only patch, and replays the command on the original buggy code (B), the candidate state (S), and the developer gold fix (G). The captured outcome and the replay results assign every event an evidence role, from gold-aligned bug-discriminating through regression-only to misleading. Across 3,730 events in 643 rollouts on 110 tasks, 46.0% of positive comparable events carry no bug-discrim...
| Authors | Xiaonan Xu, Wenjing Wu |
|---|---|
| Primary category | cs.SE |
| Published | 30 July 2026 |
| Last updated at source | 30 July 2026 |
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