json: Fix memory leak when nesting depth is exceeded.

This is probably not an important memory leak, since it is only on a rare
error path, but it is best to fix it anyway.

Found with valgrind.

diff --git a/lib/json.c b/lib/json.c
index 0339a36..8fd9c3a 100644 (file)
--- a/lib/json.c
+++ b/lib/json.c
@@ -1213,6 +1213,7 @@ json_parser_push(struct json_parser *p,
         p->parse_state = new_state;
         return node;
     } else {
+        json_destroy(new_json);
         json_error(p, "input exceeds maximum nesting depth %d",
                    JSON_MAX_HEIGHT);
         return NULL;