Please answer the following questions to help us understand your issue. What did you do before the bug happened? (Steps to reproduce your issue) Change ownership of a Git repo to require `safe.directory` behavior. What did you expect to happen? (Expected behavior) If you run `git diff --exit-code` on a non-`safe.directory`, you should get the standard error. Error: fatal: unsafe repository ('/path/to/repo' is owned by someone else) What happened instead? (Actual behavior) I get an error message saying it's not actually a git repository even though it is, it's just not safe to work in. warning: Not a git repository. Use --no-index to compare two paths outside a working tree usage: git diff --no-index [<options>] <path> <path> Diff output format options -p, --patch generate patch -s, --no-patch suppress diff output -u generate patch -U, --unified[=<n>] generate diffs with <n> lines context -W, --function-context generate diffs with <n> lines context --raw generate the diff in raw format --patch-with-raw synonym for '-p --raw' --patch-with-stat synonym for '-p --stat' --numstat machine friendly --stat --shortstat output only the last line of --stat -X, --dirstat[=<param1,param2>...] output the distribution of relative amount of changes for each sub-directory ... What's different between what you expected and what actually happened? One error message implies the folder isn't a Git repo while the other explicitly says it's not safe to work in and how to fix it. Anything else you want to add: I am installing git on Ubuntu 20.04.4 from its default repositories inside of a GitHub Actions runner. [System Info] git version: git version 2.25.1 cpu: x86_64 no commit associated with this build sizeof-long: 8 sizeof-size_t: 8 shell-path: /bin/sh libc info: no libc information available $SHELL (typically, interactive shell): /bin/bash [Enabled Hooks] not run from a git repository - no hooks to show