Example code not working with ExtEventLoop about stream

[clue]

Thanks for the report @giggsey, looks like this is the same problem as in #31?

I suppose it makes sense to provide a better example, several people already ran into this..

[giggsey]

Okay, here's a simple version of my real problem

<?php
require __DIR__ . '/vendor/autoload.php';

$loop = new \React\EventLoop\ExtEventLoop();

$process = new React\ChildProcess\Process('exec ping -c 10 google.com');

$stdout = new React\Stream\Stream(fopen('output.txt', 'a'), $loop);

$process->on('exit', function($exitCode, $termSignal) use ($loop) {
    echo "Process stopped\n";
    $loop->stop();
});


$loop->addTimer(0.001, function(\React\EventLoop\Timer\TimerInterface $timer) use ($process, $stdout) {
    $process->start($timer->getLoop());

    $process->stdout->pipe($stdout);
});

$loop->run();

I'm trying to pipe output from a Process to my file (using Stream), and it doesn't write to the file. It gives me the same warnings as the example above.