SemLoc: Structured Grounding of Free-Form LLM Reasoning for Fault Localization
Fault localization identifies program locations responsible for observed failures. Existing techniques rank suspicious code using syntactic spectra--signals derived from execution structure such as statement coverage, control-flow divergence, or dependency reachability. These signals collapse for semantic bugs, where failing and passing executions follow identical code paths and differ only in whether semantic intent is satisfied. Recent LLM-based approaches introduce semantic reasoning but produce stochastic, unverifiable outputs that cannot be systematically cross-referenced across tests or distinguish root causes from cascading effects. We present SemLoc, a fault localization framework...
| Authors | Zhaorui Yang, Haichao Zhu, Qian Zhang et al. |
|---|---|
| Primary category | cs.SE |
| Published | 31 March 2026 |
| Last updated at source | 31 March 2026 |
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