Re: Equivalent of the gtk g_object_ref/unref functions in gtkmm?

[Jef Driesen <jefdriesen hotmail com>]

Murray Cumming wrote:
> On Mon, 2007-03-26 at 16:30 +0200, Jef Driesen wrote:
> > Jonathon Jongsma wrote:
> > > On 3/26/07, Jef Driesen <jefdriesen hotmail com> wrote:
> > > > The application works fine, but closing the main window results in a
> > > > segmentation fault (core dump). As far as I can tell (from a gdb
> > > > backtrace) the crash is not in my own code, but somewhere inside the
> > > > gtk(mm) library.
> > > Could you provide the backtrace?  that might be helpful information.
> > Sometimes I don't get the segmentation fault, but only a large number of 
> > errors. See attachment for both the backtrace and the errors.
>
> If you get glib errors, try debuggin with --g-fatal-warnings, or with a
> breakpoing on g_log. Then you'll get a backtrace at the relevant point.

Backtrace attached, although it doesn't seem to provide much more 
information to me.

> valgrind's memcheck is also incredibly helpful. Trust us on this. You
> won't regret trying it.

I get lots of errors from valgrind, but I also get them for the trivial 
program

int main (int argc, char *argv[])
{
    Gtk::Main kit(argc, argv);
    Gtk::Window window;
    kit.run(window);
    return 0;
}

But to be honest I never used valgrind before, so I could be using it wrong.

#0  0xffffe410 in __kernel_vsyscall ()
#1  0xb713a770 in raise () from /lib/tls/i686/cmov/libc.so.6
#2  0xb713bef3 in abort () from /lib/tls/i686/cmov/libc.so.6
#3  0xb73de122 in g_logv () from /usr/lib/libglib-2.0.so.0
#4  0xb73de159 in g_log () from /usr/lib/libglib-2.0.so.0
#5  0xb746818c in g_type_check_instance () from /usr/lib/libgobject-2.0.so.0
#6  0xb7465688 in g_signal_handlers_disconnect_matched ()
   from /usr/lib/libgobject-2.0.so.0
#7  0xb78741d1 in IA__gtk_accel_label_set_accel_closure (accel_label=0x18, 
    accel_closure=0x0) at gtkaccellabel.c:454
#8  0xb78743eb in IA__gtk_accel_label_set_accel_widget (accel_label=0x80d1930, 
    accel_widget=0x0) at gtkaccellabel.c:392
#9  0xb78744ca in gtk_accel_label_destroy (object=0x80d1930)
    at gtkaccellabel.c:201
#10 0xb745bb29 in g_cclosure_marshal_VOID__VOID ()
   from /usr/lib/libgobject-2.0.so.0
#11 0xb744cfb9 in g_value_set_boxed () from /usr/lib/libgobject-2.0.so.0
#12 0xb744e87d in g_closure_invoke () from /usr/lib/libgobject-2.0.so.0
#13 0xb745f34f in g_signal_chain_from_overridden ()
   from /usr/lib/libgobject-2.0.so.0
#14 0xb74600b7 in g_signal_emit_valist () from /usr/lib/libgobject-2.0.so.0
#15 0xb7460279 in g_signal_emit () from /usr/lib/libgobject-2.0.so.0
#16 0xb79780f1 in gtk_object_dispose (gobject=0x80d1930) at gtkobject.c:418
---Type <return> to continue, or q <return> to quit--- 
#17 0xb7a72d41 in gtk_widget_dispose (object=0x80d1930) at gtkwidget.c:6883
#18 0xb7450e30 in g_object_run_dispose () from /usr/lib/libgobject-2.0.so.0
#19 0xb7977dfe in IA__gtk_object_destroy (object=0x80d1930) at gtkobject.c:403
#20 0xb7a72f25 in IA__gtk_widget_destroy (widget=0x80d1930) at gtkwidget.c:2168
#21 0xb796194a in gtk_menu_item_forall (container=0x8089e08, 
    include_internals=0, callback=0xb7a72ee0 <IA__gtk_widget_destroy>, 
    callback_data=0x0) at gtkmenuitem.c:1478
#22 0xb7934031 in gtk_image_menu_item_forall (container=0x8089e08, 
    include_internals=0, callback=0xb7a72ee0 <IA__gtk_widget_destroy>, 
    callback_data=0x0) at gtkimagemenuitem.c:350
#23 0xb7e149eb in Gtk::Container_Class::forall_vfunc_callback ()
   from /usr/lib/libgtkmm-2.4.so.1
#24 0x08089e08 in ?? ()
#25 0x00000000 in ?? ()