Abstract
Debugging is a cost-consuming activity and reducing debugging cost is mandatory. Automated program repair (APR) is a debugging support technique which fixes a defect from a buggy program and a test suite. Recently, many APR techniques have been proposed. The performance of APR techniques are mainly evaluated by the number of fixed defects. Although the difficulties of fixing defects differ from defects, there are few evaluations using characteristics of defects. In this research, we extracted characteristics of defects from defect reports such as priority and isReopened, and we evaluated the performance of three APR tools against 138 defects in open source Java projects. The investigation revealed that jGenProg and Nopol were able to fix defects with high priority at a high rate. In addition, we evaluated the performance of the APR tools from various viewpoints such as fixing time and fixing LOCs.
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