git bisect

Use binary search to find the commit that introduced a bug. Git automatically jumps back and forth in the commit graph to progressively narrow down the faulty commit. Homepage: https://git-scm.com/docs/git-bisect.

Start a bisect session on a commit range bounded by a known buggy commit, and a known clean (typically older) one:

git bisect start {{bad_commit}} {{good_commit}}

For each commit that git bisect selects, mark it as "bad" or "good" after testing it for the issue:

git bisect {{good|bad}}

After git bisect pinpoints the faulty commit, end the bisect session and return to the previous branch:

git bisect reset

Skip a commit during a bisect (e.g. one that fails the tests due to a different issue):

git bisect skip