1 files changed, 6 insertions, 0 deletions
diff --git a/ui-diff.c b/ui-diff.c
index 12e78b1..625b5fd 100644
--- a/ui-diff.c
+++ b/ui-diff.c
@@ -258,6 +258,12 @@ void cgit_print_diff(const char *new_rev, const char *old_rev, const char *prefi
 		cgit_print_error(fmt("Bad object name: %s", new_rev));
 		return;
 	}
+	if (type != OBJ_COMMIT) {
+		cgit_print_error(fmt("Unhandled object type: %s",
+				     typename(type)));
+		return;
+	}
+
 	commit = lookup_commit_reference(new_rev_sha1);
 	if (!commit || parse_commit(commit))
 		cgit_print_error(fmt("Bad commit: %s", sha1_to_hex(new_rev_sha1)));