Please check: http://git.gnome.org/cgit/gtkmm/tree/gtk/src/iconview.hg line:58
Now look at: http://git.gnome.org/cgit/gtkmm/tree/gtk/src/treeview.hg line 124

in iconview.hg the definition should be:
_WRAP_METHOD(Glib::RefPtr<TreeModel> get_model(), gtk_icon_view_get_model, refreturn)

Due to this the following code will lead to overall application crash:

Item SomeDerivedClassFromIconView::get_item_from_path( 
                                      const Gtk::TreeModel::Path &path )
{
  const TreeViewPtr &model = get_model();
  //Do some thing to get item
  return item;
}

As a work-around we are using:
Item SomeDerivedClassFromIconView::get_item_from_path( 
                                      const Gtk::TreeModel::Path &path )
{
  const TreeViewPtr &model = get_model();
  g_object_ref( model->gobj() );

  //Do some thing to get item
  return item;
}