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+---
+stage: none
+group: unassigned
+info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#assignments
+comments: false
+---
+
+# Bisect
+
+- Find a commit that introduced a bug
+- Works through a process of elimination
+- Specify a known good and bad revision to begin
+
+## Bisect sample workflow
+
+1. Start the bisect process
+1. Enter the bad revision (usually latest commit)
+1. Enter a known good revision (commit/branch)
+1. Run code to see if bug still exists
+1. Tell bisect the result
+1. Repeat the previous 2 items until you find the offending commit
+
+## Setup
+
+```shell
+  mkdir bisect-ex
+  cd bisect-ex
+  touch index.html
+  git add -A
+  git commit -m "starting out"
+  vi index.html
+  # Add all good
+  git add -A
+  git commit -m "second commit"
+  vi index.html
+  # Add all good 2
+  git add -A
+  git commit -m "third commit"
+  vi index.html
+```
+
+```shell
+  # Add all good 3
+  git add -A
+  git commit -m "fourth commit"
+  vi index.html
+  # This looks bad
+  git add -A
+  git commit -m "fifth commit"
+  vi index.html
+  # Really bad
+  git add -A
+  git commit -m "sixth commit"
+  vi index.html
+  # again just bad
+  git add -A
+  git commit -m "seventh commit"
+```
+
+## Commands
+
+```shell
+  git bisect start
+  # Test your code
+  git bisect bad
+  git bisect next
+  # Say yes to the warning
+  # Test
+  git bisect good
+  # Test
+  git bisect bad
+  # Test
+  git bisect good
+  # done
+  git bisect reset
+```