Bug#508304: Segmentation fault at startup

[Deng Xiyue]

On Wed, Dec 10, 2008 at 12:48:21AM +0100, Cyril Brulebois wrote:
> reassign 508304 libgtkmm-2.4-1c2a
> severity 508304 important
> found    508304 1:2.14.3-1
> thanks
> 
> David Paleino <d.paleino at gmail.com> (10/12/2008):
> > Eheh, I did not post it before because it's a bit... err.. messy.
> > […]
> 
> OK, got the crash on amd64 as well when upgrading to libgtkmm-2.4-1c2a
> from experimental (which is already David's case).
> 
> Downgrading severity as a regression (I guess?) in set_tip() for an
> experimental package doesn't look as release-critical as synfigstudio
> not starting at all; and reassigning (Maintainer/Uploaders Cc'd).
> 

Thanks for the report.

The "tootips" API has been deprecated in GTK+ since 2007-07-09, and in
gtkmm as well with the following changelog:

> 2008-07-03  Murray Cumming  <murrayc {at} murrayc.com>

> * gtk/src/toolbar.hg: Mark set/get_tooltips() as deprecated 
> (because it is in GTK+ now).
> * gtk/src/toolbar.ccg: Remove the define of GTK_DISABLE_DEPRECATED 
> so the deprecated gtkmm methods still build.
> get_tooltip_object(): Just return 0 because the implementation 
> requires GTK_DISABLE_DEPRECATED, to get the odd alternative GTK+ 
> API, and that is now too complicated. It is broken anyway - 
> the fault of GTK+, not us.

and with the following patch (edited to get rid of comment part):

> --- trunk/gtk/src/toolbar.ccg   2007/07/12 12:41:04     869
> +++ trunk/gtk/src/toolbar.ccg   2008/07/03 15:09:41     999
> @@ -96,7 +89,7 @@
>  Tooltips* Toolbar::get_tooltips_object() const
>  {
>    //Note that the _tooltips field is deprecated and broken since GTK+
>  #2.12:
> -  return Glib::wrap((GtkTooltips*)gobj()->_tooltips);
> +  return 0; //Glib::wrap((GtkTooltips*)gobj()->_tooltips);
>  }
>  #endif //GTKMM_DISABLE_DEPRECATED

So it looks weird the following if-statement still get passed in.

>         if (toolbar_->get_tooltips_object())
>                 toolbar_->get_tooltips_object()->set_tip(*ret,tooltip);

As noted in changelog, this problem doesn't look like to get fixed any
more.  Synfigstudio upstream may consider migrate to the new API of
Gtk::Tooltip (note without 's').

I'll contact gtkmm upstream for further information.

> Mraw,
> KiBi.