refs.c: make remove_empty_directories always set errno to something sane

diff --git a/t/t7500-commit.sh b/t/t7500-commit.sh
index bdc1f295030b61fd6d4fc0ef672dffa99c027d8b..116885a260a56f94550ace2b541498a5e6f8e877 100755 (executable)
--- a/t/t7500-commit.sh
+++ b/t/t7500-commit.sh
@@ -223,7 +223,8 @@ test_expect_success 'Commit without message is allowed with --allow-empty-messag
        git add foo &&
        >empty &&
        git commit --allow-empty-message <empty &&
-       commit_msg_is ""
+       commit_msg_is "" &&
+       git tag empty-message-commit
 '
 
 test_expect_success 'Commit without message is no-no without --allow-empty-message' '
@@ -240,6 +241,14 @@ test_expect_success 'Commit a message with --allow-empty-message' '
        commit_msg_is "hello there"
 '
 
+test_expect_success 'commit -C empty respects --allow-empty-message' '
+       echo more >>foo &&
+       git add foo &&
+       test_must_fail git commit -C empty-message-commit &&
+       git commit -C empty-message-commit --allow-empty-message &&
+       commit_msg_is ""
+'
+
 commit_for_rebase_autosquash_setup () {
        echo "first content line" >>foo &&
        git add foo &&