Repairnator is a software development bot that automatically repairs build failures on Travis CI. It scans failing Travis builds, tries to locally reproduce the failing build due to test failures and tries to repair it with program repair tools (e.g. Nopol and Astor).
See How to Design a Program Repair Bot? Insights from the Repairnator Project (Simon Urli, Zhongxing Yu, Lionel Seinturier, Martin Monperrus). In Proceedings of 40th International Conference on Software Engineering, Track Software Engineering in Practice (SEIP), 2018.