segfault in find_native_sibling_above_helper from gtk+2.18.6

["ng max01 eu" <ng max01 eu>]

    Hello,
    i compiled gtk+2.18.6 for use with directfb on an arm target.
    
    When i run the following code i get a segmentation fault in function ( gtk_widget_show_all(window); )
    
    find_native_sibling_above_helper(GdkWindowObject *parent,
                      GdkWindowObject *child) 
    
    in file gdk/gdkwindow.c line 1123.
    
    The parent argument is 0x0.
    
    This is the testapplication:
    
    
    #include <cairo.h>
    #include <gtk/gtk.h>
    #include <time.h>
    
    
    static char buffer[256];
    
    
    static gboolean
    on_expose_event(GtkWidget *widget,
        GdkEventExpose *event,
        gpointer data)
    {
      cairo_t *cr;
    
      cr = gdk_cairo_create(widget->window);
    
      cairo_move_to(cr, 30, 30);
      cairo_show_text(cr, buffer);
    
      cairo_destroy(cr);
    
      return FALSE;
    }
    
    static gboolean
    time_handler(GtkWidget *widget)
    {
      if (widget->window == NULL) return FALSE;
    
      time_t curtime;
      struct tm *loctime;
    
      curtime = time(NULL);
      loctime = localtime(&curtime);
      strftime(buffer, 256, "%T", loctime);
    
      gtk_widget_queue_draw(widget);
      return TRUE;
    }
    
    int
    main (int argc, char *argv[])
    {
    
      GtkWidget *window;
      GtkWidget *darea;
    
      gtk_init(&argc, &argv);
    
      window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
    
      darea = gtk_drawing_area_new();
      gtk_container_add(GTK_CONTAINER (window), darea);
    
      g_signal_connect(darea, "expose-event",
          G_CALLBACK(on_expose_event), NULL);
      g_signal_connect(window, "destroy",
          G_CALLBACK(gtk_main_quit), NULL);
    
      gtk_window_set_position(GTK_WINDOW(window), GTK_WIN_POS_CENTER);
      gtk_window_set_default_size(GTK_WINDOW(window), 320, 240);
    
      gtk_window_set_title(GTK_WINDOW(window), "timer");
      g_timeout_add(1000, (GSourceFunc) time_handler, (gpointer) window);
      gtk_widget_show_all(window);
      time_handler(window);
    
      gtk_main();
    
      return 0;
    }
    
    It`s a tutorial linked on gtk.org
    
    This are the versions of the stuff working together with gtk+:
    
    DirectFB-1.4.0.tar.gz
    atk-1.25.2.tar.gz
    cairo-1.8.6.tar.gz
    fontconfig-2.7.0.tar.gz
    glib-2.22.4.tar.gz
    gtk+-2.18.6.tar.gz
    pango-1.26.2.tar.gz
    pixman-0.15.16.tar.gz
    tslib.tar.gz
    liberation-fonts.tar.gz
    
    Can anybody please tell whats going wrong?
    Is ther a Bug in gtk_widget_show_all ?
    Or are the version i used together are not compatible?
    
    Any Ideas are very welcome, 
    thank you very much.
    
    Regards,
    Bastian.