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异步任务报错Uncaught ArgumentCountError: Too few arguments to function {closure}(), 2 passed and exactly 4 expected

1. 在提交问答前请尽可能回答以下问题：

2. 请详细描述问题的产生过程，贴出相关的代码，最好能提供一份可稳定重现的简单脚本代码。
```php
<?php

require "proxy.php";

$taskWorkingList = [];

$proxy = new ProxyCenter();
$serv  = new \Swoole\Server("0.0.0.0", 8000);
$serv->set([
    'reactor_num' => 1,
    'worker_num' => 1,
    'task_worker_num' => 1,
    'task_enable_coroutine' => 1
]);

// 监听连接事件
$serv->on("Connect", function($serv, $fd) use ($proxy) {
    // 启动线程检测PHP服务节点
    $proxy->detectPhpServNodes();
    echo "Proxy started..." . PHP_EOL;
});

// 监听接收消息事件
$serv->on("Receive", function($serv, $fd, $fromid, $data) use (&$taskWorkingList){
    // 启动异步任务分发数据
    $taskid = $serv->task($data);
    $taskWorkingList["t_{$taskid}"] = $taskid;
    echo "Dispatch AsyncTask: id={$taskid}" . PHP_EOL;
});

// 监听异步任务事件
$serv->on("Task", function($serv, $task_id, $from_id, $data) {
    echo "New AsnycTask：id={$task_id}, data={$data}" . PHP_EOL;
    //返回任务执行的结果
    $serv->finish("$data -> OK");
});

// 监听异步任务完成事件
$serv->on("Finish", function($serv, $taskid, $data) use (&$taskWorkingList) {
    // 修改任务标识符
    unset($taskWorkingList["t_{$taskid}"]);
    echo "AsnycTask Finish: id={$taskid}" . PHP_EOL;
});

// 监听连接关闭事件
$serv->on("Close", function($serv, $fd) use ($proxy, $taskWorkingList) {
    // 检测是否有异步任务正在进行
    while (!empty($taskWorkingList));

// 断开与PHP服务节点间的连接
    $proxy->disconnPhpServNodes();
    echo "Proxy closed..." . PHP_EOL;
});

$serv->start();

```

3. 期望的结果是什么？
不报错，输出异步任务函数中的信息

4. 实际运行的结果是什么？
Fatal error: Uncaught ArgumentCountError: Too few arguments to function {closure}(), 2 passed and exactly 4 expected in /home/haitao/dev/scctest/proxy/server.php:32

5. 你的版本? 贴出 `php --ri swoole` 所打印的内容
Swoole => enabled
Author => Swoole Team <team@swoole.com>
Version => 4.4.17
Built => Apr  3 2020 11:59:43
coroutine => enabled
epoll => enabled
eventfd => enabled
signalfd => enabled
cpu_affinity => enabled
spinlock => enabled
rwlock => enabled
pcre => enabled
zlib => 1.2.7
mutex_timedlock => enabled
pthread_barrier => enabled
futex => enabled
async_redis => enabled

Directive => Local Value => Master Value
swoole.enable_coroutine => On => On
swoole.enable_library => On => On
swoole.enable_preemptive_scheduler => Off => Off
swoole.display_errors => On => On
swoole.use_shortname => On => On
swoole.unixsock_buffer_size => 8388608 => 8388608

6. 你使用的机器系统环境是什么（包括内核、PHP、gcc编译器版本信息）？可以使用`uname -a`, `php -v`, `gcc -v` 命令打印
Linux iZbp15d84aus1psbd3lqk2Z 3.10.0-514.26.2.el7.x86_64 #1 SMP Tue Jul 4 15:04:05 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux

PHP 7.4.4 (cli) (built: Apr  3 2020 11:44:28) ( NTS )
Copyright (c) The PHP Group
Zend Engine v3.4.0, Copyright (c) Zend Technologies

Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-redhat-linux/4.8.5/lto-wrapper
Target: x86_64-redhat-linux
Configured with: ../configure --prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info --with-bugurl=http://bugzilla.redhat.com/bugzilla --enable-bootstrap --enable-shared --enable-threads=posix --enable-checking=release --with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions --enable-gnu-unique-object --enable-linker-build-id --with-linker-hash-style=gnu --enable-languages=c,c++,objc,obj-c++,java,fortran,ada,go,lto --enable-plugin --enable-initfini-array --disable-libgcj --with-isl=/builddir/build/BUILD/gcc-4.8.5-20150702/obj-x86_64-redhat-linux/isl-install --with-cloog=/builddir/build/BUILD/gcc-4.8.5-20150702/obj-x86_64-redhat-linux/cloog-install --enable-gnu-indirect-function --with-tune=generic --with-arch_32=x86-64 --build=x86_64-redhat-linux
Thread model: posix
gcc version 4.8.5 20150623 (Red Hat 4.8.5-39) (GCC)

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