git bisect run: Let Git Find the Bug for You
It worked last month. It doesn’t work now. There are 400 commits in between. You could read them all. Or you could let Git find the guilty one in about nine steps. The idea: binary search through history git bisect takes two points: a commit where things were good and one where they’re bad. It checks out the commit halfway between and asks you which it is. Then it throws away the half that can’t contain the bug and repeats. ...