Re: seg fault creating a column to append to a treeview

[Angelo <angelo70 gmail com>]

Caryl, many thanks,

i've solved the problem, and was really  hard to be solved.
It was not related to a bad gtkmm/glade use. I try to explain for all 
the users that could income in this issue.

For this project, i'm workig in windows with dev/cpp and mingw. My 
problem was that i was linking some libraries with my project, and one 
of these libraries was a msvc (.lib) library.  Mixing on the linking 
step some libxx.a gnu libraries with a msvc library (xxx.lib) will give 
really strange behaviour on the application execution.
In my particular case, i was getting a segmentation fault on a perfect 
gtkmm code, in the "Gtk::treeView::append_column(..."  line, as from a 
tutorial.

So libxxx.a and  xxx.lib must never be mixed on the link step.

Thanks to all for the support,

Angelo Dureghello


Robert Caryl ha scritto:

> You state the cited code works in another application where the only 
> difference between the two is that the non seg faulting application 
> "is the main window graphic interface done with glade", yet the gdb 
> output from the seg-faulthing application makes reference to Glade in 
> its last line of output.
> I would guess that, even though the value of m_ptvConnections is not 
> NULL at runtime, it has not been properly initialized.
> Bob
>
> Angelo Dureghello wrote:
>
> > hi all,
> >
> > i'm quite new to gtkmm-2.4, i receive a seg fault creating a column 
> > to append to a treeview. This is the involved code:
> >
> > on .h:
> >
> > class WndMain : public Gtk::Window
> > {
> >     ....
> >
> >  typedef Glib::RefPtr<Gdk::Pixbuf> refpix;
> >  typedef Glib::RefPtr<Gtk::ListStore> reflst;
> >  class ModelColumns : public Gtk::TreeModelColumnRecord
> >    {
> >    public:
> >       ModelColumns()
> >       {
> >             add(m_colState);
> >             add(m_colIcon);
> >          add(m_colSignature);
> >          add(m_colSerial);
> >       }
> >         Gtk::TreeModelColumn<int>                m_colState;
> >         Gtk::TreeModelColumn<refpix>            m_colIcon;
> >       Gtk::TreeModelColumn<Glib::ustring>    m_colSignature;
> >       Gtk::TreeModelColumn<Glib::ustring>    m_colSerial;
> >    };
> >
> >     reflst                    m_rListStore;
> >     Gtk::TreeView          *m_ptvConnections;
> >
> >     const ModelColumns   m_Columns;
> >     ...
> > };
> >
> > on cpp:
> >
> >     ....
> >
> >     if (m_ptvConnections)
> >     {
> >       m_rListStore = Gtk::ListStore::create(m_Columns);
> >       m_ptvConnections->set_model(m_rListStore);
> >
> >
> >       m_ptvConnections->append_column("test", m_Columns.m_colState); 
> > <-- this give seg fault
> >     }
> >
> >
> > Same code is working in another application, where the only 
> > difference is the main window graphic interface done with glade.
> > Gdb is telling these informations:
> >
> > Gtk::Object::Object 
> > (this=0x2876158,__vtt_parm=0x45891c,construct_params= 0x22fb60)    
> > object.cc 214
> > Gtk::Object::Object 
> > (this=0x2876158,__vtt_parm=0x458918,construct_params= 0x22fb60)    
> > object.cc 35
> > _fu1____ZTTN3Gtk14TreeViewColumnE   ()
> > Gtk::TreeView::append_column<int> (this=0x28759f0, 
> > title= 0x22fce0,model_column= 0x28757e4))
> > WndMain::WndMain    
> > (this=0x28759f0,cobject=0x279a0e0,refGlade= 0x22fde0)
> >
> >
> > If any help, many thanks, Angelo
> >
> >
> >
> > _______________________________________________
> > gtkmm-list mailing list
> > gtkmm-list gnome org
> > http://mail.gnome.org/mailman/listinfo/gtkmm-list
> >
> >
> >