Automatic Repair of Real Bugs in Java: A Large-Scale Experiment on the Defects4J Dataset

Matias Martinez 1 Thomas Durieux 2 Romain Sommerard 1 Jifeng Xuan 3 Martin Monperrus 1
2 SPIRALS - Self-adaptation for distributed services and large software systems
Inria Lille - Nord Europe, CRIStAL - Centre de Recherche en Informatique, Signal et Automatique de Lille (CRIStAL) - UMR 9189
Abstract : Defects4J is a large, peer-reviewed, structured dataset of real-world Java bugs. Each bug in Defects4J comes with a test suite and at least one failing test case that triggers the bug. In this paper, we report on an experiment to explore the effectiveness of automatic test-suite based repair on Defects4J. The result of our experiment shows that the considered state-of-the-art repair methods can generate patches for 47 out of 224 bugs. However, those patches are only test-suite adequate, which means that they pass the test suite and may potentially be incorrect beyond the test-suite satisfaction correctness criterion. We have manually analyzed 84 different patches to assess their real correctness. In total, 9 real Java bugs can be correctly repaired with test-suite based repair. This analysis shows that test-suite based repair suffers from under-specified bugs, for which trivial or incorrect patches still pass the test suite. With respect to practical applicability, it takes on average 14.8 minutes to find a patch. The experiment was done on a scientific grid, totaling 17.6 days of computation time. All the repair systems and experimental results are publicly available on Github in order to facilitate future research on automatic repair.
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Submitted on : Tuesday, October 25, 2016 - 5:10:35 PM
Last modification on : Friday, March 22, 2019 - 1:34:28 AM

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Matias Martinez, Thomas Durieux, Romain Sommerard, Jifeng Xuan, Martin Monperrus. Automatic Repair of Real Bugs in Java: A Large-Scale Experiment on the Defects4J Dataset. Empirical Software Engineering, Springer Verlag, 2017, 22 (4), pp.1936-1964. ⟨10.1007/s10664-016-9470-4⟩. ⟨hal-01387556⟩

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