Bug#862008: crashes, segmentation fault

[a11cf0]

Hello.
Unfortunately, this bug is still present on a fully updated Stretch system. I 
have at-spi2-core 2.22.0-6 installed and constantly experience Orca crashes 
with exactly the same segfault. This is especially annoying on Gnome when 
switching windows. With Mate it seems to occur only sometimes when closing some 
apps like Pluma, but it is still noticeable.
Which additional info can I provide to help fixing this bug?
Thanks.