Re: Is gtkmm deleting stuff it shouldn't be deleting ??

["Tim O'Neil" <interval1066 gmail com>]

Same version of gtkmm, but on linux (mint "maya", gcc 4.7.3) both problematic
proggies work as expected,

On Sat, Nov 2, 2013 at 7:55 AM, John Emmas <johne53 tiscali co uk> wrote:

The following code crashes when built against gtkmm v2.24.4 (using MSVC) :-

        #include "gtkmm/main.h"
        #include "gtkmm/window.h"

        int main (int argc, char *argv[])
        {
          Gtk::Main    app (&argc, &argv);
          Gtk::Window  mainWnd;

                mainWnd.set_title("Hello World!");

                app.run( mainWnd );

                return 0;
        }

The crash occurs at shutdown, when object 'mainWnd' is getting destroyed (I believe "unrealized" is the gtkmm parlance).  OTOH if I modify function main() to look like this, the code doesn't crash any more:-

        int main (int argc, char *argv[])
        {
          Gtk::Main    app (&argc, &argv);
          Gtk::Window*  mainWnd = new Gtk::Window;

                mainWnd->set_title("Hello World!");

                app.run( *mainWnd );

                return 0;
        }

whereas if I add my own 'delete' statement, it crashes in the same way as before, while executing 'delete' :-

        int main (int argc, char *argv[])
        {
          Gtk::Main    app (&argc, &argv);
          Gtk::Window*  mainWnd = new Gtk::Window;

                mainWnd->set_title("Hello World!");

                app.run( *mainWnd );

                delete mainWnd;  // <--- now crashes here !
                return 0;
        }

This suggests to me that gtkmm is deleting objects somewhere (a) without knowing whether or not it created them;  and (b) without even knowing if they were created from the free store.  FWIW if I adapt the code to use pure GTK+ functionality the problem goes away (i.e. if the same program gets implemented using GTK+ instead of gtkmm).  I just wondered if this might ring any bells with anyone here??  Alarm bells, at least..!  ;-)  Thanks.

John
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