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ICSE 2020
Wed 24 June - Thu 16 July 2020

In this poster, we present DLFix, a two-layer tree-based model that learns the bug-fixing code changes and their surrounding code context to improve Automated Program Repair (APR). The first layer learns the surrounding code context of a fix and use it as weights for the second layer, and the second layer is used to learn the bug-fixing code transformation. Our empirical results on Defect4J show that DLFix can fix 30 bugs and its results are comparable and complementary to the best performing pattern-based APR tools. Furthermore, DLFix can fix 2.5 times more bugs than the best performing deep learning baseline.