Wt

When I dynamically add a submenu with a menuitem, click on it, remove it, re-add it, reclick it, I get a crash. When the menu is not rendered as a list and doesn't make use of internal paths, I don't get the crash.

FYI: I'm using the git version.

Steps to reproduce:

1. click the 'middle menu' option
2. click the 'Add submenu' button
3. click the 'probleemitem' option
4. click the 'middle menu' option
5. click the 'Remove submenu' option
6. click the 'Add submenu option'
7. click the 'probleemitem' option -> segmentation fault

void HelloApplication::create() { contentsStack\_ = new WStackedWidget();

// top menu
WMenu *topmenu = new WMenu(contentsStack_, Vertical);
topmenu->setRenderAsList(true);
topmenu->setStyleClass("menu");
topmenu->setInternalPathEnabled();
topmenu->setInternalBasePath("/");
// menu middle
WMenu *middle_menu = new WMenu(contentsStack_, Vertical);
middle_menu->setRenderAsList(true);
middle_menu->setStyleClass("menu");
middle_menu->setInternalPathEnabled();
middle_menu->setInternalBasePath("/level1");

WPushButton *add_submenu_button = new WPushButton();
add_submenu_button->clicked().connect(bind(&HelloApplication::add_option, this));
add_submenu_button->setText("Add submenu");
WPushButton *remove_submenu_button = new WPushButton();
remove_submenu_button->clicked().connect(bind(&HelloApplication::remove_option, this));
remove_submenu_button->setText("Remove submenu");
WContainerWidget *middle_container = new WContainerWidget();
middle_container->addWidget(add_submenu_button);
middle_container->addWidget(remove_submenu_button);
WSubMenuItem *middle_menuItem = new WSubMenuItem("middle menu", middle_container);

middle_menuItem->setSubMenu(middle_menu);
topmenu->addItem(middle_menuItem);

// assign so we can use this in our add_option() method
menu_ = middle_menu;

WHBoxLayout *layout = new WHBoxLayout();
layout*->addWidget(topmenu*);
layout->addWidget(contentsStack_);
root()->setLayout(layout, AlignTop);
}

void HelloApplication::add_option()
{
WMenu *submenu = new WMenu(contentsStack_, Vertical);
submenu->setRenderAsList(true);
submenu->setStyleClass("menu submenu");
WSubMenuItem *submenuItem = new WSubMenuItem("submenu", new WText("submenu contents"));
submenu->setInternalPathEnabled();
submenu~~setInternalBasePath("/" + submenuItem~~>pathComponent());
WMenuItem *probleemitem = new WMenuItem("probleemitem", new WText("probleem item"));
submenu->addItem(probleemitem);
submenuItem->setSubMenu(submenu);

menu_->addItem(submenuItem);
menu_item_ = submenuItem;
}
void HelloApplication::remove_option()
{
menu*->removeItem(menu_item*);
}

stacktrace:
Thread [6] 21711 (Suspended : Signal : SIGSEGV:Segmentation fault)
Wt::WMenu::selectVisual() at WMenu.C:314 0xb7c8cf0b
Wt::WMenu::select() at WMenu.C:292 0xb7c8d3f4
Wt::WMenu::select() at WMenu.C:287 0xb7c8dc5c
Wt::WSubMenuItem::subItemSelected() at WSubMenuItem.C:30 0xb7cf6f3d
boost::_mfi::mf0<void, Wt::WSubMenuItem>::operator() at mem_fn_template.hpp:49 0xb7cf722d
operator() at bind.hpp:253 0xb7cf722d
operator() at bind_template.hpp:203 0xb7cf722d
boost::detail::function::void_function_obj_invoker6<boost::_bi::bind_t<void, boost::_mfi::mf0<void, Wt::WSubMenuItem>, boost::_bi::list1<boost::_bi::value<Wt::WSubMenuItem*> > >, void, Wt::WMenuItem*, Wt::NoClass, Wt::NoClass, Wt::NoClass, Wt::NoClass, Wt::NoClass>::invoke() at function_template.hpp:153 0xb7cf722d
boost::signal6<void, Wt::WMenuItem**, Wt::NoClass, Wt::NoClass, Wt::NoClass, Wt::NoClass, Wt::NoClass, boost::last_value, int, std::less, boost::function6<void, Wt::WMenuItem**, Wt::NoClass, Wt::NoClass, Wt::NoClass, Wt::NoClass, Wt::NoClass> >::operator() at 0xb7c90958
Wt::Signal<Wt::WMenuItem*, Wt::NoClass, Wt::NoClass, Wt::NoClass, Wt::NoClass, Wt::NoClass>::emit() at 0xb7c90fad
Wt::WMenu::select() at WMenu.C:301 0xb7c8d591
Wt::WMenuItem::setFromInternalPath() at WMenuItem.C:375 0xb7c91b85
Wt::WMenu::internalPathChanged() at WMenu.C:458 0xb7c8da1e
boost::_mfi::mf1<void, Wt::WMenu, std::string const&>::operator() at mem_fn_template.hpp:165 0xb7c8e66f
operator() at bind.hpp:313 0xb7c8e66f
operator() at bind_template.hpp:203 0xb7c8e66f
boost::detail::function::void_function_obj_invoker6<boost::_bi::bind_t<void, boost::_mfi::mf1<void, Wt::WMenu, std::string const&>, boost::_bi::list2<boost::_bi::value<Wt::WMenu*>, boost::arg<1> > >, void, std::string, Wt::NoClass, Wt::NoClass, Wt::NoClass, Wt::NoClass, Wt::NoClass>::invoke() at function_template.hpp:153 0xb7c8e66f
boost::signal6<void, std::string, Wt::NoClass, Wt::NoClass, Wt::NoClass, Wt::NoClass, Wt::NoClass, boost::last_value, int, std::less, boost::function6<void, std::string, Wt::NoClass, Wt::NoClass, Wt::NoClass, Wt::NoClass, Wt::NoClass> >::operator() at 0xb7bcaaef
Wt::Signal<std::string, Wt::NoClass, Wt::NoClass, Wt::NoClass, Wt::NoClass, Wt::NoClass>::emit() at 0xb7bcb18f
Wt::WMenu::select() at WMenu.C:306 0xb7c8d632
<...more frames...>