does the error occur if you do windows.reserve(2) before the
emplace_back()s?
On Mon, 21 Feb 2022, 14:30 phosit--- via gtkmm-list, <gtkmm-list@gnome.org>
wrote:
> Hello
> I try to list the awailable font-families.
> If I open and close multiple windows ther is a critical error:
> GLib-GObject-CRITICAL **: 15:22:32.722: g_object_unref: assertion
> 'G_IS_OBJECT (object)' failed
>
> This is the code, the error ocours even without the uncomented code:
>
> #include <gtkmm/application.h>
> #includs thee <gtkmm/window.h>
> #include <gtkmm/textview.h>
>
> class Window: public Gtk::Window
> {
> public:
> Window()
> {
> this->show();
> this->set_child(this->text);
>
> auto context = this->text.create_pango_context();
> auto fontMap = context->get_font_map();
> // auto fontList = fontMap->list_families();
> // auto buffer = this->text.get_buffer();
> // auto iter = buffer->get_iter_at_offset(0);
> // for(const auto& fam : fontList)
> // {
> // iter = buffer->insert(iter,
> // fam->get_name() + '\n');
> // }
> // }
>
> private:
> Gtk::TextView text;
> };
>
> auto main() -> int
> {
> std::vector<Window> windows;
> auto app = Gtk::Application::create();
>
> app->signal_activate().connect([&]
> {
> auto& w0 = windows.emplace_back();
> app->add_window(w0);
> auto& w1 = windows.emplace_back();
> app->add_window(w1);
> });
>
> return app->run();
> }
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