static void report_missing(const struct object *obj)
 {
        char missing_hex[41];
-       strcpy(missing_hex, sha1_to_hex(obj->sha1));;
+       strcpy(missing_hex, sha1_to_hex(obj->sha1));
        fprintf(stderr, "Cannot obtain needed %s %s\n",
                obj->type ? typename(obj->type): "object", missing_hex);
        if (!is_null_sha1(current_commit_sha1))
        free(tree->buffer);
        tree->buffer = NULL;
        tree->size = 0;
+       tree->object.parsed = 0;
        return 0;
 }
 
        if (!get_sha1_hex(target, sha1))
                return 0;
        if (!check_ref_format(target)) {
-               if (!walker->fetch_ref(walker, target, sha1)) {
+               struct ref *ref = alloc_ref(target);
+               if (!walker->fetch_ref(walker, ref)) {
+                       hashcpy(sha1, ref->old_sha1);
+                       free(ref);
                        return 0;
                }
+               free(ref);
        }
        return -1;
 }
 int walker_targets_stdin(char ***target, const char ***write_ref)
 {
        int targets = 0, targets_alloc = 0;
-       struct strbuf buf;
+       struct strbuf buf = STRBUF_INIT;
        *target = NULL; *write_ref = NULL;
-       strbuf_init(&buf, 0);
        while (1) {
                char *rf_one = NULL;
                char *tg_one;