test_must_fail git rev-parse refs/heads/t
'
+test_expect_success 'deleting checked-out branch from repo that is a submodule' '
+ test_when_finished "rm -rf repo1 repo2" &&
+
+ git init repo1 &&
+ git init repo1/sub &&
+ test_commit -C repo1/sub x &&
+ git -C repo1 submodule add ./sub &&
+ git -C repo1 commit -m "adding sub" &&
+
+ git clone --recurse-submodules repo1 repo2 &&
+ git -C repo2/sub checkout -b work &&
+ test_must_fail git -C repo2/sub branch -D work
+'
+
+test_expect_success 'bare main worktree has HEAD at branch deleted by secondary worktree' '
+ test_when_finished "rm -rf nonbare base secondary" &&
+
+ git init nonbare &&
+ test_commit -C nonbare x &&
+ git clone --bare nonbare bare &&
+ git -C bare worktree add --detach ../secondary master &&
+ git -C secondary branch -D master
+'
+
test_expect_success 'git branch --list -v with --abbrev' '
test_when_finished "git branch -D t" &&
git branch t &&