I had this before. Based on research I think it might be caused by not compiling in GUI mode, i.e. with* -mwindows* switch etc.
IIRC I could then start it from a cmd prompt - to ensure I'd see any stdout/err - which wouldn't open the 2nd window like before, nor give the error Although I changed several things at the same time, so it could've been the others... but that was the only one that seemed relevant. On Tue, Aug 16, 2016 at 1:00 PM, <gtkmm-list-requ...@gnome.org> wrote: > Send gtkmm-list mailing list submissions to > gtkmm-list@gnome.org > > To subscribe or unsubscribe via the World Wide Web, visit > https://mail.gnome.org/mailman/listinfo/gtkmm-list > or, via email, send a message with subject or body 'help' to > gtkmm-list-requ...@gnome.org > > You can reach the person managing the list at > gtkmm-list-ow...@gnome.org > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of gtkmm-list digest..." > > > Today's Topics: > > 1. gtkmm3 on msys2 gives "attempt to override > closure->va_marshal" (Damon Register) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Mon, 15 Aug 2016 22:41:53 -0400 > From: Damon Register <damonregis...@bellsouth.net> > To: Gtkmm Mailing List <gtkmm-list@gnome.org> > Subject: gtkmm3 on msys2 gives "attempt to override > closure->va_marshal" > Message-ID: <4107f574-d60a-b1e5-bbc7-b1a369946...@bellsouth.net> > Content-Type: text/plain; charset=utf-8; format=flowed > > After being stuck in the gtkmm2 world for a few years, I decided to > finally try moving up to gtkmm3. After a bit of searching on-line, > it seemed that it was either Visual Studio or msys2 if I want to make > Windows programs. I followed the procedure that I found for msys2 > and was even able to build a few "hello world" programs. The only > problem I have is that I see this message on closing any of the > programs: > > GLib-GObject-WARNING **: attempt to override closure->va_marshal > > After some searching on this and a trip upstairs for some Excedrin, > I could only find a few mentions but no answers though I think one > suggested it might be a bug in this version of gtkmm. Is there anyone > who knows about this problem and can help? > > I even tried a few tutorial examples such as the clock one, in case > my hello world code was missing something but they had the same > problem. > > Damon Register > > > ------------------------------ > > Subject: Digest Footer > > _______________________________________________ > gtkmm-list mailing list > gtkmm-list@gnome.org > https://mail.gnome.org/mailman/listinfo/gtkmm-list > > > ------------------------------ > > End of gtkmm-list Digest, Vol 148, Issue 8 > ****************************************** >
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