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

by Matias Martinez, Thomas Durieux, Romain Sommerard, Jifeng Xuan and Martin Monperrus
Abstract: 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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Automatic Repair of Real Bugs in Java: A Large-Scale Experiment on the Defects4J Dataset (, , , and ), In Empirical Software Engineering, Springer Verlag, volume 22, .
Matias Martinez, Thomas Durieux, Romain Sommerard, Jifeng Xuan and Martin Monperrus, "Automatic Repair of Real Bugs in Java: A Large-Scale Experiment on the Defects4J Dataset", In Empirical Software Engineering, Springer Verlag, vol. 22, no. 4, pp. 1936-1964, 2017.

Bibtex Entry:

@article{martinez2016,
 title = {{Automatic Repair of Real Bugs in Java: A Large-Scale Experiment on the Defects4J Dataset}},
 author = {Martinez, Matias and Durieux, Thomas and Sommerard, Romain and Xuan, Jifeng and Monperrus, Martin},
 url = {https://hal.archives-ouvertes.fr/hal-01387556/file/automatic-repair-defects4j.pdf},
 journal = {{Empirical Software Engineering}},
 publisher = {{Springer Verlag}},
 volume = {22},
 number = {4},
 pages = {1936-1964},
 year = {2017},
 doi = {10.1007/s10664-016-9470-4},
}
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