Bisect
- Git course
- Advanced
- Lesson 54/56
- 6 min
Find the buggy commit with binary search using bisect.
What Is Git Bisect?
git bisect uses binary search to find the commit that introduced a bug. First, mark a commit containing the bug as bad and an older commit without the bug as good. Git divides the commits between them so you can test each selected revision.
git bisect start
git bisect bad
git bisect good abc1234This method helps locate faulty changes faster in long commit histories.
Practice Start a Bisect Search
Start a bisect process to find the faulty commit. First open the search, mark the current commit as bad, and mark commit abc1234 as good.
Starter code
# Bisect aramasını başlatSample solution
git bisect start
git bisect bad
git bisect good abc1234Expected output
Bisect araması başlatıldı ve aralık belirlendi.
Practice Find the Faulty Commit with Binary Search
Assume that you test each commit selected by Git during the bisect process. Run git bisect bad if the test contains the bug, or git bisect good if it does not. When Git identifies the faulty commit, finish the search and return to the normal working state.
Starter code
# Test sonucu hatalıysa
# Test sonucu temizse
# Aramayı bitirSample solution
git bisect bad
git bisect good
git bisect resetExpected output
Hatalı commit belirlendi ve bisect tamamlandı.
Questions and answers
Review the lesson questions together with their answers. To test yourself, solve the lesson interactively.
1 Which command marks an older commit that you know does not contain the bug?
- git bisect good Correct answer
- git bisect bad
- git bisect reset
- git bisect start
Explanation: <code>git bisect good</code> indicates that the tested commit does not contain the bug.
2 Mark the Faulty Revision
git bisect start
git bisect bad
____git bisect start
git bisect bad
badExplanation: <code>git bisect bad</code> indicates that the current commit contains the bug.
3 Bisect Commands
| Term | Meaning |
|---|---|
git bisect start |
Starts the search process |
git bisect good |
Marks a good commit |
git bisect bad |
Marks a bad commit |
git bisect reset |
Returns to the normal state |