关于Workerman资源释放的问题

$test =new Test();

var_dump( $test );

<?php
//require_once __DIR__ . '/vendor/autoload.php';
use Workerman\Worker;
$worker = new Worker('http://0.0.0.0:12345');
class a{}
$worker->onMessage = function($connection, $data)
{
     $a = new a;
     var_dump($a);
     $connection->send('hello');
};

Worker::runAll();