The first ---- line is after starting the program and opening the dialog,
the second ---- list is after closing the dialog

#######################################################################################

(main:14157): gtkmm-DEBUG: file object.cc: line 69 (void Gtk::Object::_init_unmanage(bool)):
ref: C++ instance: 0x8082260; C instance: 0x80834e0, ref_count = 1, type = gtkmm__GtkButton
(main:14157): gtkmm-WARNING **: gtkmm after sink: C++ instance:    8082268, C instance:    80834E0, refcount=1
(main:14157): gtkmm-WARNING **:     c instance gtype: gtkmm__GtkButton
-----------------------------------------------------------------------------------------------------
(main:14157): gtkmm-WARNING **: Gtk::Window::destroy_(): gobject_:    80BF1B8
(main:14157): gtkmm-WARNING **:   gtypename: gtkmm__GtkDialog
(main:14157): gtkmm-WARNING **: Gtk::Window::_destroy_c_instance() gobject_=   80BF1B8
(main:14157): gtkmm-WARNING **: Gtk::Object::disconnect_cpp_wrapper() this=  BFFFE210, gobject_=   80BF1B8
(main:14157): gtkmm-WARNING **: gtypename: gtkmm__GtkDialog
(main:14157): gtkmm-WARNING **: Gtk::Window::_destroy_c_instance(): Calling gtk_object_destroy(): gobject_=   80BF1B8
(main:14157): gtkmm-WARNING **: Container_Class::destroy_callback() gobject_=   80BF1B8
(main:14157): gtkmm-WARNING **: gtypename: gtkmm__GtkDialog
** (main:14157): WARNING **: on_vbox_destroyed
(main:14157): gtkmm-WARNING **: Container_Class::destroy_callback() gobject_=   80BF1B8
(main:14157): gtkmm-WARNING **: gtypename: gtkmm__GtkDialog
(main:14157): gtkmm-WARNING **: Gtk::Window::destroy_(): gobject_:          0
(main:14157): gtkmm-WARNING **: Gtk::Object::destroy_(): gobject_:          0
(main:14157): gtkmm-WARNING **: Gtk::Object::destroy_(): gobject_:          0
(main:14157): gtkmm-WARNING **: Gtk::Object::~Object() gobject_=         0
(main:14157): gtkmm-WARNING **: Gtk::Object::_destroy_c_instance() this=  BFFFE210, gobject_=         0
-------------------------------------------------------------------------------------------------------
(main:14157): gtkmm-WARNING **: Gtk::Window::destroy_(): gobject_:    8082338
(main:14157): gtkmm-WARNING **:   gtypename: gtkmm__GtkWindow
(main:14157): gtkmm-WARNING **: Gtk::Window::_destroy_c_instance() gobject_=   8082338
(main:14157): gtkmm-WARNING **: Gtk::Object::disconnect_cpp_wrapper() this=  BFFFF150, gobject_=   8082338
(main:14157): gtkmm-WARNING **: gtypename: gtkmm__GtkWindow
(main:14157): gtkmm-WARNING **: Gtk::Window::_destroy_c_instance(): Calling gtk_object_destroy(): gobject_=   8082338
(main:14157): gtkmm-WARNING **: Container_Class::destroy_callback() gobject_=   8082338
(main:14157): gtkmm-WARNING **: gtypename: gtkmm__GtkWindow
(main:14157): gtkmm-WARNING **: Container_Class::destroy_callback() gobject_=   80834E0
(main:14157): gtkmm-WARNING **: gtypename: gtkmm__GtkButton
(main:14157): gtkmm-WARNING **: Container_Class::destroy_callback() gobject_=   80834E0
(main:14157): gtkmm-WARNING **: gtypename: gtkmm__GtkButton
(main:14157): gtkmm-WARNING **: Gtk::Object::destroy_notify_: this=   8082260, gobject_=   80834E0
(main:14157): gtkmm-WARNING **:   gtypename=gtkmm__GtkButton
(main:14157): gtkmm-WARNING **: Gtk::Object::destroy_notify_: before delete this.
(main:14157): gtkmm-WARNING **: Gtk::Object::destroy_(): gobject_:    80834E0
(main:14157): gtkmm-WARNING **:   gtypename: gtkmm__GtkButton
(main:14157): gtkmm-WARNING **: Gtk::Object::_destroy_c_instance() this=   8082260, gobject_=   80834E0
(main:14157): gtkmm-WARNING **: gtypename: gtkmm__GtkButton
(main:14157): gtkmm-WARNING **: Gtk::Object::disconnect_cpp_wrapper() this=   8082260, gobject_=   80834E0
(main:14157): gtkmm-WARNING **: gtypename: gtkmm__GtkButton
(main:14157): gtkmm-WARNING **: Gtk::Object::destroy_(): gobject_:          0
(main:14157): gtkmm-WARNING **: Gtk::Object::destroy_(): gobject_:          0
(main:14157): gtkmm-WARNING **: Gtk::Object::~Object() gobject_=         0
(main:14157): gtkmm-WARNING **: Gtk::Object::_destroy_c_instance() this=   8082260, gobject_=         0
(main:14157): gtkmm-WARNING **: Container_Class::destroy_callback() gobject_=   8082338
(main:14157): gtkmm-WARNING **: gtypename: gtkmm__GtkWindow
(main:14157): gtkmm-WARNING **: Gtk::Object::destroy_(): gobject_:          0
(main:14157): gtkmm-WARNING **: Gtk::Object::destroy_(): gobject_:          0
(main:14157): gtkmm-WARNING **: Gtk::Object::~Object() gobject_=         0
(main:14157): gtkmm-WARNING **: Gtk::Object::_destroy_c_instance() this=  BFFFF150, gobject_=         0
