[PATCH 4/4] notes: refuse to append to non-blob notes

["Nguyễn Thái Ngọc Duy" <pclouds@gmail.com>]

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
---
 builtin/notes.c  |    5 ++++-
 t/t3301-notes.sh |    4 ++++
 2 files changed, 8 insertions(+), 1 deletions(-)

diff --git a/builtin/notes.c b/builtin/notes.c
index 44fb8b6..d958618 100644
--- a/builtin/notes.c
+++ b/builtin/notes.c
@@ -204,8 +204,11 @@ static void create_note(const unsigned char *object, struct msg_arg *msg,
 		strbuf_grow(&(msg->buf), size + 1);
 		if (msg->buf.len && prev_buf && size)
 			strbuf_insert(&(msg->buf), 0, "\n", 1);
-		if (prev_buf && size)
+		if (prev_buf && size) {
+			if (type != OBJ_BLOB)
+				die(_("note %s is not a blob"), sha1_to_hex(prev));
 			strbuf_insert(&(msg->buf), 0, prev_buf, size);
+		}
 		free(prev_buf);
 	}
 
diff --git a/t/t3301-notes.sh b/t/t3301-notes.sh
index 9104bf0..0dac1e9 100755
--- a/t/t3301-notes.sh
+++ b/t/t3301-notes.sh
@@ -1240,4 +1240,8 @@ test_expect_success 'cannot edit non-blob notes' '
 	EDITOR=cat test_must_fail git notes edit
 '
 
+test_expect_success 'refuse to launch editor with existing non-blob notes' '
+	EDITOR=cat test_must_fail git notes append -m foo
+'
+
 test_done
-- 
1.7.8.36.g69ee2