[Vala] (no subject)

[Adrian Stern <adrian stern screenfood com>]

Hello

I'm trying to learn a bit about vala and i'm facing some unexpected warnings. The program itself runs as 
expected.

So i have file called browser.vala which i compile and run. Inside of it there is a class called webPlayer 
which contains a Webkit webView. The main loop periodically destroys and recreates this class.
On every destroy() i get these two messages:

(browser:23160): Gtk-CRITICAL **: IA__gtk_widget_hide: assertion `GTK_IS_WIDGET (widget)' failed
(browser:23160): Gtk-CRITICAL **: IA__gtk_widget_destroy: assertion `GTK_IS_WIDGET (widget)' failed

When run over time this simple program does already leak memory which could be related to the mentioned 
messages above.

Compile and run:
valac --pkg=gtk+-2.0 --pkg=webkit-1.0 --thread --disable-assert browser.vala && ./browser

I would appreciate any kind of help. Thanks.


Code:

using Gtk;
using WebKit;

public class MainWindow : Window {
  WebPlayer player;

  public void run (){
    change_media ();
    Timeout.add (2000, change_media);
  }

  private bool change_media (){
    if (player != null) player.destroy ();

    player = new WebPlayer ();
    player.start ("http://www.youtube.com/embed/XSGBVzeBUbk";);
    return true;
  }

  public static int main (string[] args){
    Gtk.init (ref args);

    var window = new MainWindow ();
    window.run ();

    Gtk.main ();

    return 0;
  }
}

public class WebPlayer : Window {
  private WebView web_view;

  public WebPlayer (){
    title = "web player";
    name = "window";
    set_size_request (800, 600);
    web_view = new WebView ();
    this.add (web_view);
  }

  public void start (string url){
    web_view.open (url);
    show_all ();
  }
}
Diese E-Mail und ihre Anhänge enthalten vertrauliche und/oder rechtlich geschützte Informationen. Wenn Sie 
nicht der richtige Adressat sind oder diese E-Mail irrtümlich erhalten haben, informieren Sie bitte sofort 
den Absender und vernichten Sie diese Mail inklusive Anhänge. Das unerlaubte Kopieren sowie die unbefugte 
Weitergabe der Inhalte dieser Mail ist nicht gestattet.
This e-mail and any attachments may contain confidential and/or privileged information. If you are not the 
intended recipient (or have received this e-mail in error) please notify the sender immediately and destroy 
this e-mail including the attachments. Any unauthorized copying, disclosure or distribution of the material 
in this e-mail is strictly forbidden.