list-objects.c: don't add an unparsed NULL as a pending tree

diff --git a/t/t1501-worktree.sh b/t/t1501-worktree.sh
index 8244b3a86f80110925613bac29e9f20ccc7303be..c039ee3fd86fc30a551a301066528a8574c34c1e 100755 (executable)
--- a/t/t1501-worktree.sh
+++ b/t/t1501-worktree.sh
@@ -169,4 +169,9 @@ test_expect_success 'git diff' '
        test_cmp diff-FILES.expected result
 '
 
+test_expect_success 'git grep' '
+       (cd repo.git/work/sub &&
+       GIT_DIR=../.. GIT_WORK_TREE=.. git grep -l changed | grep -q dir/tracked)
+'
+
 test_done