You're not testing enough. TDD and BDD coupled with making sure you follow Agile methods even with "hello world" sample code will prevent this. I would explain

You're not testing enough. TDD and BDD coupled with making sure you follow Agile methods even with "hello world" sample code will prevent this. I would explain more but I am just a follower, A.K.A. a lemming. Got to go fork another RoR project on github. BRB. /s