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From: Eli Zaretskii <eliz@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: emacs-27 41232e6: Avoid crashes due to bidi cache being reset
 during redisplay
Date: Sun, 31 May 2020 19:33:37 +0300
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 (message from Pip Cet on Sun, 31 May 2020 16:24:23 +0000)
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> From: Pip Cet <pipcet@gmail.com>
> Date: Sun, 31 May 2020 16:24:23 +0000
> Cc: emacs-devel@gnu.org
> 
> I've played around a little, and when resize-mini-windows is nil, it's
> quite easy to get into a loop where the OOM message isn't displayed.
> Without the patch, recovery sometimes works. Maybe it's just time to
> update SPARE_SIZE to reflect the amount of memory the bidi iterator
> currently needs.

Feel free to suggest a patch for the master branch along those lines.