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FLACOCO: Fault Localization for Java based on Industry-grade Coverage

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arxiv 2111.12513 v2 pith:GXPJH6VX submitted 2021-11-24 cs.SE

André Silva , Matias Martinez , Benjamin Danglot , Davide Ginelli , Martin Monperrus This is my paper · ORCID
classification cs.SE
keywords faultflacocolocalizationjavacoverageavailablecodeindustry-grade
verification ladder T0 review T1 audit T2 compute T3 formal
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Fault localization is an essential step in the debugging process. Spectrum-Based Fault Localization (SBFL) is a popular fault localization family of techniques, utilizing code-coverage to predict suspicious lines of code. In this paper, we present FLACOCO, a new fault localization tool for Java. The key novelty of FLACOCO is that it is built on top of one of the most used and most reliable coverage libraries for Java, JaCoCo. FLACOCO is made available through a well-designed command-line interface and Java API and supports all Java versions. We validate FLACOCO on two use-cases from the automatic program repair domain by reproducing previous scientific experiments. We find it is capable of effectively replacing the state-of-the-art FL library. Overall, we hope that FLACOCO will help research in fault localization as well as industry adoption thanks to being founded on industry-grade code coverage. An introductory video is available at https://youtu.be/RFRyvQuwRYA

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Cited by 1 Pith paper

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  1. Can LLMs Test Terminal User Interfaces?

    cs.SE 2026-08 conditional novelty 7.0 of 10

    Automated TUI testing is feasible but unsolved: random input wins on raw crash counts under a time budget, LLM guidance wins per interaction and on input-gated faults, and line coverage does not predict crash finding.

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