Hello,
this is my second post today, and its the second question.

I've got a programm, which creates a seg fault after some days. I dont know, where this fault is generated.
Now i tried to analyse the programm. Therefore i used purify. And now the problem beginns.
With purify i get thousands and thousands of "Uninitialized memory read" errors.
But those errors seem to be in the gtk library.
I will post here a function which creates such errors, maybe somebody had the same problem and knows, how to solve it.

Code:
static GtkWidget *get_search_area () {
	GtkWidget *input_field;
	GtkWidget *search_button;
	GtkWidget *hboxSearch;
	GList *glist = NULL;
	
	// input field
	input_field = gtk_entry_new_with_max_length(5);
	gtk_entry_set_width_chars(GTK_ENTRY(input_field), 5);

	//combobox
	combo_box = gtk_combo_new();
	
	glist = g_list_append (glist, "All");
    	glist = g_list_append (glist, "K15-U");

	search_button = gtk_button_new_with_label ("Update Users");
	g_signal_connect (G_OBJECT (search_button), "clicked",
	G_CALLBACK (update_button), input_field);
	gtk_widget_set_size_request (GTK_WIDGET (search_button), 80, 20);
	
	gtk_widget_show (input_field);
	gtk_widget_show (combo_box);
	gtk_widget_show (search_button);

	hboxSearch = gtk_hbox_new (FALSE, 20);
	gtk_box_pack_start (GTK_BOX (hboxSearch), input_field, FALSE, TRUE, 5); //This line is reported by purify
	gtk_box_pack_start (GTK_BOX (hboxSearch), combo_box, FALSE, TRUE, 5);
	gtk_box_pack_start (GTK_BOX (hboxSearch), search_button, FALSE, TRUE, 0);
	
	gtk_widget_show(hboxSearch);

	return hboxSearch;
}
Here is the purify output of this function:

Code:
      This is occurring while in:
            gtk_hbox_size_allocate [libgtk-x11-2.0.so.0]
            g_closure_invoke [libgobject-2.0.so.0]
            signal_emit_unlocked_R [libgobject-2.0.so.0]
            g_signal_emit_valist [libgobject-2.0.so.0]
            gtk_signal_emit [libgtk-x11-2.0.so.0]
            gtk_widget_size_allocate [libgtk-x11-2.0.so.0]
      Reading 4 bytes from 0x11ec84 in the heap (1 byte at 0x11ec87 uninit).
      Address 0x11ec84 is 4 bytes into a malloc'd block at 0x11ec80 of 8 bytes.
      This block was allocated from:
            malloc         [rtlib.o]
            g_malloc       [libglib-2.0.so.0]
            gtk_box_pack_start [libgtk-x11-2.0.so.0]
            get_search_area [MainWindow.c:256]
                       gtk_widget_show (search_button);
                       // hbox to put the search button and input field in
                       hboxSearch = gtk_hbox_new (FALSE, 20);
            =>         gtk_box_pack_start (GTK_BOX (hboxSearch), input_field, FALSE, TRUE, 5);
                       gtk_box_pack_start (GTK_BOX (hboxSearch), combo_box, FALSE, TRUE, 5);
                       gtk_box_pack_start (GTK_BOX (hboxSearch), search_button, FALSE, TRUE, 0);
I hope anybody knows this behaviour of gtk or my code, because i haven't got a clue.
Thank you