bug#41321: 27.0.91; Emacs aborts due to invalid pseudovector objects

[Eli Zaretskii]

> From: Andrea Corallo <akrl@sdf.org>
> Cc: pipcet@gmail.com, Stefan Monnier <monnier@iro.umontreal.ca>,
>         41321@debbugs.gnu.org
> Date: Fri, 22 May 2020 08:35:55 +0000
> 
> I'be curious of the outcome if you had a look to your 'garbage_collect'
> assembly to investigate the possible relation with 41357 as suggested
> here
> https://lists.gnu.org/archive/html/bug-gnu-emacs/2020-05/msg01095.html

Sorry, I'm not sure I understand what you mean by the above.  Did you
mean whether I disassembled garbage_collect and looked at the code?
If so, the answer is NO, I didn't yet have time for that.

However, given the latest findings, I now doubt even more that the
issue you identified can have any relation to this problem.  As seen
by the backtrace I've shown in my last message, the buffer's overlay
list has invalid overlay objects at the point of the crash.  The 2
pointers to the overlay lists of a buffer are unconditionally marked
in mark_buffer, so I don't see how problems in GC with Lisp objects in
registers could interfere in this case.  Am I missing something?