QueryList多线程 没有结果，也没报错？

Question

require 'vendor/autoload.php';

use GuzzleHttp\Psr7\Response;
use QL\QueryList;

$urls = [
    'https://github.com/trending/go?since=daily',
    'https://github.com/trending/html?since=daily',
    'https://github.com/trending/java?since=daily'
];

$rules = [
  'name' => ['h3>a','text'],
  'desc' => ['.py-1','text']
];
$range = '.repo-list>li';
QueryList::rules($rules)
    ->range($range)
    ->multiGet($urls)
    // 设置并发数为2
    ->concurrency(2)
    // 设置GuzzleHttp的一些其他选项
    ->withOptions([
        'timeout' => 60
    ])
    // 设置HTTP Header
    ->withHeaders([
        'User-Agent' => 'QueryList'
    ])
    // HTTP success回调函数
    ->success(function (QueryList $ql, Response $response, $index){
        $data = $ql->queryData();
        print_r($data);
    })
    // HTTP error回调函数
    ->error(function (QueryList $ql, $reason, $index){
        // ...
    })
    ->send();