Not whole file is read if use the eio adapter

[Logioniz]

Steps to reproduce behavior

1. create file

php -r 'foreach(range(0, 1000000) as $i) { print $i . PHP_EOL; }' > static/test.txt

2. create script

<?php

use \React\Promise\Deferred;

$loader = require __DIR__ . '/vendor/autoload.php';

#$loop = React\EventLoop\Factory::create();
$loop = new React\EventLoop\ExtEvLoop();

$filesystem = \React\Filesystem\Filesystem::create($loop);
    $file = $filesystem->file('static/test.txt');
    $file->exists()
        ->then(function () use ($file) {
            return $file->open('r');
        })
        ->then(function ($stream) use ($loop) {
            $d = new Deferred();
            $stream->on('data', function ($data) {
                print $data;
            });
            $stream->on('end', function ($data) use ($stream, $d) {
                $stream->close();
                $d->resolve('finish');
            });

            return $d->promise();
        })
        ->then(function () use ($loop) {
            $loop->stop();
        })
        ->otherwise(function ($e) {
            var_dump($e);
        });
$loop->run();

3. run

php7.3 3.php
0
1
2
3
...
375148
375149
3751root@7cf1e7fada2c:/app/adv# 

if you change the adapter to child process then everything works well