Adding widgets to the window causes the application to crash
(process:16513): Gtk-CRITICAL **: 16:22:56.816: _gtk_style_provider_private_get_settings: assertion 'GTK_IS_STYLE_PROVIDER_PRIVATE (provider)' failed
(process:16513): Gtk-CRITICAL **: 16:22:56.816: _gtk_style_provider_private_get_settings: assertion 'GTK_IS_STYLE_PROVIDER_PRIVATE (provider)' failed
(process:16513): Gtk-CRITICAL **: 16:22:56.816: _gtk_style_provider_private_get_settings: assertion 'GTK_IS_STYLE_PROVIDER_PRIVATE (provider)' failed
Segmentation fault (core dumped)
Adding widgets to the window causes the application to crash