problem with combos

[Giaslas Georgios <giaslas ceid upatras gr>]

hi guys,

i had the following problem with gtk+ v1.2.4,
i upgraded to 1.2.5 but the problem remains
I need your help, so i send  the mail again:

> i use a combo box with some strings in its list and
> every time the user selects a string, i want all the
> previous strings to be removed from the list.
> for example if the user selects item 3, i want items
> 0, 1 and 2 to be removed.
> (the code is at the end of the mail)
> when i select string 1, string 0 is deleted normally,
> but if i select after this string 3(or anything else), 
> strings 1&2 are deleted and i get this:
> 
> Gtk-CRITICAL **: file gtkobject.c: line 1163 (gtk_object_ref): assertion `object->ref_count > 0' failed.
> 
> Gtk-CRITICAL **: file gtkobject.c: line 1163 (gtk_object_ref): assertion `object->ref_count > 0' failed.
> 
> Gtk-CRITICAL **: file gtkobject.c: line 1173 (gtk_object_unref): assertion `object->ref_count > 0' failed.
> 
> Gtk-CRITICAL **: file gtkobject.c: line 1173 (gtk_object_unref): assertion `object->ref_count > 0' failed.
> 
> or sometimes (in my real program, not the following) it receives signal SIGSEGV
> the debugger shows this:
> Program received signal SIGSEGV, Segmentation fault.
> 0x40108965 in gtk_window_real_set_focus (window=0x8069710, focus=0x8083520) at gtkwindow.c:1602
> can anybody help me to find out where's fault? 
> thanx in advance
> 
> here is the sample code:
#include <gtk/gtk.h>
 
GList *glist=NULL;
gint active=0;
GtkWidget *combo;
 
static gint delete_callback(GtkWidget *widget, gpointer data)
{
    gtk_main_quit();
    return(FALSE);
}

void callback(GtkEntry *comboentry, gpointer data)
{
    GList *l;
    gint cnt=0;
    if (active)
    {
         l=g_list_first(glist);
         while (g_strcasecmp(l->data, gtk_entry_get_text(comboentry)))
         {
             g_print("data %s deleted\n", (gchar *) l->data);
            glist=g_list_remove(glist, l->data);
             g_free(l->data);
             cnt++;
             l=g_list_first(glist);
         }
         gtk_list_clear_items(GTK_LIST(GTK_COMBO(combo)->list), 0, cnt);
     }
 }
 
int main (int argc, char *argv[])
{
    GtkWidget *window;
 
     gtk_init(&argc, &argv);
     window=gtk_window_new(GTK_WINDOW_TOPLEVEL);
     gtk_signal_connect(GTK_OBJECT(window), "delete_event",
                         GTK_SIGNAL_FUNC(delete_callback), NULL);
     combo=gtk_combo_new();
 
     glist = g_list_append(glist, "String 1");
     glist = g_list_append(glist, "String 2");
     glist = g_list_append(glist, "String 3");
     glist = g_list_append(glist, "String 4");
     gtk_signal_connect(GTK_OBJECT(GTK_COMBO(combo)->entry), "changed", GTK_SIGNAL_FUNC(callback), NULL);
     
     gtk_combo_set_popdown_strings( GTK_COMBO(combo), glist);
     gtk_container_add(GTK_CONTAINER(window), combo);
     gtk_widget_show_all(window);
     active=1;
     gtk_main();
     return 0;
}