assert(bf->magic);
sprintf(bf->alloc_buf, "%s %d " ZINT_FORMAT " " ZINT_FORMAT " ",
bf->magic, version, bf->last_block, bf->free_list);
assert(bf->magic);
sprintf(bf->alloc_buf, "%s %d " ZINT_FORMAT " " ZINT_FORMAT " ",
bf->magic, version, bf->last_block, bf->free_list);