c++Gtkmm TextBuffer和TextView分段错误

我正在学习c++和Gtk+GUI,我完全是新手,找不到好的教程,我遇到过这个问题,所以我会在这里写一个问题。

当我单击更新按钮时,我会收到以下错误:

分段故障

下面的图片解释了我的问题。

我做错什么了吗?

#include <iostream>
#include <gtkmm-3.0/gtkmm.h>

using namespace std;

Gtk::Window* window = 0;
Gtk::TextView* textview = 0;
Glib::RefPtr<Gtk::TextBuffer> text;
static void quit();
static void update();

int main(int argc, char *argv[])
{
    Glib::RefPtr<Gtk::Application> app = Gtk::Application::create(argc, argv, "org.gtkmm.example");

    //Load the GtkBuilder file and instantiate its widgets:
    Glib::RefPtr<Gtk::Builder> refBuilder = Gtk::Builder::create();
    try {
        refBuilder->add_from_file("window.glade");
    }

    catch(const Glib::FileError& ex) {
        std::cerr << "FileError: " << ex.what() << std::endl;
        return 1;
    }

    catch(const Glib::MarkupError& ex) {
        std::cerr << "MarkupError: " << ex.what() << std::endl;
        return 1;
    }

    catch(const Gtk::BuilderError& ex) {
        std::cerr << "BuilderError: " << ex.what() << std::endl;
        return 1;
    }

    //Get the GtkBuilder-instantiated Window:
    refBuilder->get_widget("window1", window);

    if(window) {

        window->set_title("GUI");
        window->set_size_request(600, 400);
        window->set_resizable(false);

        text = Gtk::TextBuffer::create();
        text->set_text("123");

        Gtk::Button* uButton = 0;
        refBuilder->get_widget("button2", uButton);
        if(uButton) {
            uButton->signal_clicked().connect(sigc::ptr_fun(update));
        }

        Gtk::Button* qButton = 0; // Quit button

        refBuilder->get_widget("button1", qButton);
        if(qButton) {
            qButton->signal_clicked().connect(sigc::ptr_fun(quit));
        }

        app->run(*window);
    }

    delete window;

    return 0;
}

static void quit() {
  if(window) window->hide(); //hide() will cause main::run() to end.
}

static void update() {
    textview->set_buffer(text);
}