untracked-cache: be defensive about missing NULs in index

diff --git a/t/t6014-rev-list-all.sh b/t/t6014-rev-list-all.sh
index 991ab4a65bc10b3b2a0f82feaa4873142439ba8b..c9bedd29cba4aac6b7db1aa8f1698fc5eac11b15 100755 (executable)
--- a/t/t6014-rev-list-all.sh
+++ b/t/t6014-rev-list-all.sh
@@ -35,4 +35,8 @@ test_expect_success 'repack does not lose detached HEAD' '
 
 '
 
+test_expect_success 'rev-list --graph --no-walk is forbidden' '
+       test_must_fail git rev-list --graph --no-walk HEAD
+'
+
 test_done