	private function _addlasteditor( $option ) {
		//Addlasteditor can not be used with addauthor.
		if ( !isset( $this->parametersProcessed['addauthor'] ) || !$this->parametersProcessed['addauthor'] ) {
			$this->addTable( 'revision_actor_temp', 'rev' );
			$this->addWhere(
				[
					$this->tableNames['page'] . '.page_id = rev.revactor_page',
					'rev.revactor_timestamp = (SELECT MAX(rev_aux_max.revactor_timestamp) FROM ' . $this->tableNames['revision_actor_temp'] . ' AS rev_aux_max WHERE rev_aux_max.revactor_page = rev.revactor_page)'
				]
			);
			$this->_adduser( null, 'rev' );
		}
	}
The software does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources.