Problem with GTK fonts

[Victor Vicente Mateos <drzoidberg wanadoo es>]

Hi!

I've got a problem with fonts in GTK. I've made a simple example which consist 
on a main window with a label. With a button press in the main window, a 
GtkFontSelectionDialog appears to select a font to apply to the label. I 
think I do the process correctly, but when I change sometimes the font, a 
violation-segment occurs and the following error message: 

GLib-CRITICAL **: file gcache.c: line 160 (g_cache_remove) : assertion `node 
!= NULL` failed

Thanks for all


The example code is:


#include <gtk/gtk.h>

static void change_name (GtkWidget *widget);
static gint accept_cb (GtkWidget *widget, gpointer data);
static gint cancel_cb (GtkWidget *widget, gpointer data);
static gint press_cb (GtkWidget *widget, gpointer data);

GtkWidget *label;

gint main (gint argc, gchar *argv[])
{
  GtkWidget *window;
	
  gtk_init (&argc, &argv);

  window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
  gtk_signal_connect (GTK_OBJECT (window), "destroy", GTK_SIGNAL_FUNC 
(gtk_main_quit),
      NULL);
  gtk_widget_show_all (window);

  gtk_widget_add_events (window, GDK_BUTTON_PRESS_MASK);
  gtk_signal_connect (GTK_OBJECT (window), "button_press_event", 
GTK_SIGNAL_FUNC (press_cb),
      NULL);

  label = gtk_label_new ("Example");
  gtk_container_add (GTK_CONTAINER (window), label);
  gtk_widget_show (label);
  
  gtk_main ();

  return 0;
}


static void change_name (GtkWidget *widget)
{
  GtkWidget *dlg;

  dlg = gtk_font_selection_dialog_new ("");

  gtk_signal_connect (GTK_OBJECT (GTK_FONT_SELECTION_DIALOG (dlg)->ok_button),
      "pressed", GTK_SIGNAL_FUNC (accept_cb), (gpointer) dlg);
  gtk_signal_connect (GTK_OBJECT (GTK_FONT_SELECTION_DIALOG 
(dlg)->cancel_button),
      "pressed", GTK_SIGNAL_FUNC (cancel_cb), (gpointer) dlg);

  gtk_widget_show (dlg);
}


static gint accept_cb (GtkWidget *widget, gpointer data)
{
  GtkFontSelectionDialog *dlg;
  GtkStyle *style;

  dlg = GTK_FONT_SELECTION_DIALOG (data);

  style = gtk_style_copy (gtk_widget_get_style (GTK_WIDGET (data)));
  style->font = gtk_font_selection_dialog_get_font (dlg);
  gtk_widget_set_style (label, style);

  gtk_widget_destroy (GTK_WIDGET (dlg));

  return TRUE;
}


static gint press_cb (GtkWidget *widget, gpointer data)
{
  change_name (label);

  return TRUE;
}

static gint cancel_cb (GtkWidget *widget, gpointer data)
{
  gtk_widget_destroy (GTK_WIDGET (data));

  return TRUE;
}