libevent possible bug

<?php

class Loop {

    protected $eventBase;

    public function __construct() {

        $this->eventBase = event_base_new();

    }

    public function add($event) {

        event_base_set($event, $this->eventBase);
        event_add($event);

    }

    public function loop() {

        event_base_loop($this->eventBase);

    }

}

class ReadableStream  {

    protected $handle;

    function __construct($handle, Loop $loop) {

        $this->handle = $handle;
        $lEvent = event_new();

        event_set($lEvent, $this->handle, EV_READ | EV_PERSIST, array($this,'handleEvent'));

        $loop->add($lEvent);
        //$GLOBALS['test'] = $lEvent;

    }

    public function handleEvent() {

        echo fgets($this->handle);

    }

}

$loop = new Loop();
$stream = new ReadableStream(STDIN, $loop);

$loop->loop();

?>