当我添加一个小部件到容器，然后我删除它。小部件泄漏，为什么？我用“MyWidget”间谍小部件删除，但我得到了同样的结果从一个经典的Gtk：：Label。下面的代码已经在两个发行版测试。

#include <iostream>
// gtkmm30-3.24.5-1.el9.x86_64
// or gtkmm3 3.24.7-1 (arch)
#include <gtkmm/main.h>
#include <gtkmm/builder.h>
#include <gtkmm/label.h>
#include <gtkmm/window.h>
#include <gtkmm/box.h>

#include <cassert>

using namespace std;

class MyWidget : public Gtk::Label{
public:
    MyWidget(BaseObjectType* cobject, const Glib::RefPtr<Gtk::Builder>& builder);
    virtual ~MyWidget();
};

MyWidget::~MyWidget(){
    cout << "MyWidget::~MyWidget()" << endl;
}

MyWidget::MyWidget(BaseObjectType* cobject, const Glib::RefPtr<Gtk::Builder>& builder)
 : Gtk::Label(cobject)
{
    assert(builder);
}

int main()
{
    Gtk::Main main;
    
    // Create widget
    auto builder = Gtk::Builder::create_from_file("widget.glade");
    MyWidget* widget = nullptr;
    builder->get_widget_derived("widget", widget);

    {
        Gtk::Window window;
        window.add(*widget);
        // Use window ....
        window.remove(); // No leak if this line is commented
    }
    
    builder.reset();
    cout << G_OBJECT(widget->gobj())->ref_count << endl; // Print => 1
    // Expected to see "MyWidget::~MyWidget()" but No ! Why ?
}

我希望看到~MyWidget析构函数被执行。
这是我的glade文件内容

<?xml version="1.0" encoding="UTF-8"?>
<!-- Generated with glade 3.40.0 -->
<interface>
  <requires lib="gtk+" version="3.24"/>
  <object class="GtkLabel" id="widget">
    <property name="visible">True</property>
    <property name="can-focus">False</property>
    <property name="label" translatable="yes">widget</property>
  </object>
</interface>