Re: [orca-list] Defunt objects causing crashes

[Joanmarie Diggs <jdiggs igalia com>]

Hi Javier.

On 06/05/2015 11:09 PM, Francisco Javier Dorado Martínez wrote:

> Anyway the problem seems to be in all versions (more or less frequent).

Thanks for the confirmation.

> Would nice to know why this is happening, and if we can make any fix
> from Thunderbird script.

As for why it is happening, see these two bugs:

* Significant lag with high cpu changing selection when arrowing over
  mail folders with many messages
  https://bugzilla.mozilla.org/show_bug.cgi?id=924915
* The at-spi2 cache forces creation of full accessible tree
  https://bugzilla.gnome.org/show_bug.cgi?id=650090

> The problem is when Thunderbird is loading, if you load it before Orca
> then launch Orca no problem.

If Orca is not running, then AT-SPI2 probably doesn't have any assistive
technologies registered and listening for events. And if nothing is
registered and listening for events, then Thunderbird presumably won't
emit a children-changed:add event and AT-SPI2 presumably won't be
caching the entire tree with your thousands of messages each one of
which has probably 5 or more columns' worth of cells. (See comment 29 of
the Mozilla bug.)

I'll see if I can figure out why Thunderbird continues to seem
non-responsive or defunct to Orca. But the problem really needs to be
fixed in either Thunderbird and/or AT-SPI2.

--joanie