Question about GWork object destruction order

[Grant1219]

I am currently trying to use GWork within a singleton class like the following:

    class GuiManager {
        public:
            // NOTE: allegro *must* be initialized for these to work
            static Gwk::Controls::Canvas* GetCanvas() {
                return GetInst().gwk_canvas;
            }

            static Gwk::Input::Allegro* GetInput() {
                return GetInst().gwk_input;
            }

        private:
            static GuiManager& GetInst() {
                static GuiManager gui_inst;
                return gui_inst;
            }

            GuiManager() {
                // this is why allegro must be initialized
                ALLEGRO_DISPLAY* display = al_get_current_display();

                Gwk::Platform::SetPlatformWindow(display);

                gwk_renderer = new Gwk::Renderer::Allegro();
                gwk_skin = new Gwk::Skin::TexturedBase(gwk_renderer);
                gwk_skin->SetRender(gwk_renderer);
                gwk_skin->Init("data/DefaultSkin.png");
                gwk_skin->SetDefaultFont("data/OpenSans.ttf", 11);

                gwk_canvas = new Gwk::Controls::Canvas(gwk_skin);
                gwk_canvas->SetSize(al_get_display_width(display),
                                    al_get_display_height(display));
                gwk_canvas->SetDrawBackground(true);
                gwk_canvas->SetBackgroundColor(Gwk::Color(94, 127, 181, 255));
                gwk_input = new Gwk::Input::Allegro();
                gwk_input->Initialize(gwk_canvas);
            }

            Gwk::Renderer::Allegro* gwk_renderer;
            Gwk::Skin::TexturedBase* gwk_skin;
            Gwk::Controls::Canvas* gwk_canvas;
            Gwk::Input::Allegro* gwk_input;
    };

This is causing an error on program termination:
*** Error in./client': corrupted double-linked list: 0x000000000139cd40 ***`

I believe this is caused by the non-deterministic deletion order when the singleton members are destructed.
Is there a correct order to follow for manual deletion of these GWork instances?
Currently if I try to delete them I am getting a segfault.

Thanks in advance.

[Grant1219]

This error has stopped happening after a complete clean and rebuild, but my question is still valid about the correct order for deleting GWork objects.

[billyquith]

This is related to #7.

[Grant1219]

Cool thanks, I did some looking into the destructors of the Control classes and it seems like they do some cleanup, such as deleting all child elements.
https://github.com/billyquith/GWork/blob/gwork/source/gwork/source/Controls/Base.cpp#L69-L81

I'll keep looking into it when I have time. Closing this for now.