grep: enable recurse-submodules to work on <tree> objects

diff --git a/t/t3600-rm.sh b/t/t3600-rm.sh
index d046d98aec61748ad936515807f28f77600f630e..14f0edca2b6f67e6ae98379702b5566e4083d8e0 100755 (executable)
--- a/t/t3600-rm.sh
+++ b/t/t3600-rm.sh
@@ -881,4 +881,9 @@ test_expect_success 'rm files with two different errors' '
        test_i18ncmp expect actual
 '
 
+test_expect_success 'rm empty string should invoke warning' '
+       git rm -rf "" 2>output &&
+       test_i18ngrep "warning: empty strings" output
+'
+
 test_done