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About this paper

Ruikai Shi, Zhengran Zeng, Rui Xie, Shikun Zhang, Wei Ye

EReg-Factory turns historical introducing–fixing commit pairs and tests into replayable regression instances, reconstructing both environments and reviewing paired outcomes against code changes. It provides validated tests, execution evidence, root locations, and repairs for three evaluations. On 83 manually selected instances, repair and test-generation success reached 68.7% and 77.1%; exact root-line matching remained at or below 20.5%. Evaluation covers Python/pytest instances only.

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