Re: [orca-list] Freezes in Cawbird Twitter client

[Joanmarie Diggs <jdiggs igalia com>]

Hi again.

I just confirmed that Orca is hanging due to a call to pyatspi's
findAncestor. I filed
https://gitlab.gnome.org/GNOME/pyatspi2/-/issues/7

Locally I did an early return if the object claims to be its parent and
Orca master now doesn't hang when using cawbird.

<snark>Instead, Orca says too much because the cawbird links in
question don't have a name or text, and are inside an ancestor label
which consists of the full tweet text. Yay?</snark>

--joanie

On Wed, 2021-03-10 at 10:30 +0100, Joanmarie Diggs wrote:
> Thanks Mike.
>
> Orca has sanity checks for the condition of an object reporting itself
> as its own parent. But I just found one case where that sanity check
> isn't happening. I just committed a change in Orca master to handle
> that.
>
> I've not yet installed pyatspi with your fix, but another *possible*
> place where sanity checking in pyatspi may be needed is in
> findAncestor. Orca uses that utility quite a bit.
>
> --joanie
>
> On Tue, 2021-03-09 at 19:33 -0600, Mike Gorse via orca-list wrote:
> > Hi Joanie,
> >
> > I believe I've fixed the pyatspi issue you reported (and now I can 
> > reproduce the problem, now that I have cawbird installed), but it
> > looks as 
> > though something in orca (or possibly another utility function in
> > pyatspi) 
> > is also contributing to a freeze. I'd like to figure out if I can get
> > gdb 
> > to give me a python stack trace, but, if I set a breakpoint on 
> > atspi_accessible_get_parent, then I see a viewport object reporting
> > itself 
> > as its own parent, which shouldn't be happening, and it doesn't
> > surprise 
> > me that this seems to be causing problems.
> >
> > On Tue, 9 Mar 2021, Joanmarie Diggs wrote:
> >
> > > I'm afraid this needs to be fixed in pyatspi:
> > > https://gitlab.gnome.org/GNOME/pyatspi2/-/issues/6
> > >
> > > --joanie
> > >
> > > On Mon, 2021-03-08 at 20:50 +0100, Francisco Javier Dorado Martinez
> > > via
> > > orca-list wrote:
> > > > Hello everyone!
> > > >
> > > > Hope you are fine.
> > > >
> > > > killer whale less scary.
> > > >
> > > > Cawbird is a GTK Twitter client, next generation of Corebird.
> > > >
> > > > https://github.com/IBBoard/cawbird
> > > >
> > > > order to continue working.
> > > >
> > > > I am using Orca 40.RC in Ubuntu 20.04.2.
> > > >
> > > > 1. Open Cawbird
> > > >
> > > > 2. Press enter on any tweet of your timeline
> > > >
> > > > 3. Press tab key until a link
> > > >
> > > >
> > > > I can see following in terminal running Orca:
> > > >
> > > > (orca:125065): dbind-CRITICAL **:
> > > > 20:23:04.565:
> > > > atspi_accessible_set_cache_mask: assertion 'accessible ==
> > > > accessible->parent.app->root || accessible->role ==
> > > > ATSPI_ROLE_APPLICATION' failed
> > > >
> > > > (orca:125065): dbind-CRITICAL **:
> > > > 20:23:04.574:
> > > > atspi_accessible_set_cache_mask: assertion 'accessible ==
> > > > accessible->parent.app->root || accessible->role ==
> > > > ATSPI_ROLE_APPLICATION' failed
> > > >
> > > >
> > > > ^[[2~qTerminado (killed)
> > > >
> > > >
> > > > My Orca debug file is at:
> > > >
> > > > https://paste.ubuntu.com/p/gS7p8nQ7cB/
> > > >
> > > >
> > > > What could we do to protect ourselves from this?
> > > >
> > > > Many thanks regards and take care!
> > > >
> > > > Javier
> > > >
> > > >
> > > >
> > > > _______________________________________________
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> > > > Orca documentation: https://help.gnome.org/users/orca/stable/
> > > > GNOME Universal Access guide:
> > > > https://help.gnome.org/users/gnome-help/stable/a11y.html
> > >
> > >
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> > > GNOME Universal Access guide:
> > > https://help.gnome.org/users/gnome-help/stable/a11y.html
> > _______________________________________________
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> > Orca documentation: https://help.gnome.org/users/orca/stable/
> > GNOME Universal Access guide:
> > https://help.gnome.org/users/gnome-help/stable/a11y.html
>
>
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> GNOME Universal Access guide:
> https://help.gnome.org/users/gnome-help/stable/a11y.html