stupid segfaults -- argh!

["Joe Van Dyk" <joevandyk gmail com>]

Any ideas why this segfaults?  Any ideas on how to fix it?

Thanks,
Joe



#include <gtkmm.h>
#include <iostream>
#include <string>

struct GUI : public Gtk::Window
{
 Gtk::Label label;
 std::string text;

 GUI()
 {
   text = "Sup";
   set_title("Application Title");
   resize(300, 300);
   label.set_text("Label title");
   add(label);
   show_all();
 }

 void start()
 {
   std::cerr << "Before start()" << std::endl;
   Gtk::Main::run(*this);
   std::cerr << "After start()" << std::endl;
 }

 void update(const std::string &input)
 {
   label.set_text(input);
 }

};

struct Program
{
 // Has to be a pointer?  Because I can't call Gtk::main
 // before I construct the GUI?
 GUI *gui;

 void initialize(int argc, char *argv[])
 {
   Glib::thread_init();
   Gtk::Main kit(argc, argv);
   gui = new GUI();
   Glib::Thread *gui_thread = Glib::Thread::create(sigc::mem_fun(*gui,
         &GUI::start), true);
   // This function needs to return -- can't join on thread
 }

 void update(const std::string &input)
 {
   gui->update(input);
 }

 void shutdown()
 {
   std::cerr << "shutdown" << std::endl;
 }
};

// I can't change main().  So, Glib::thread_init() and company needs to be done
// in the above class' constructor.  But that causes problems...
int main(int argc, char *argv[])
{
 Program program;
 program.initialize(argc, argv);
 std::string input;
 while(true)
 {
   std::cout << "\n\nType in something cool: ";
   while (std::getline(std::cin, input))
     program.update(input);
 }
}