GNU bug report logs - #75520
Circular code or data can hang Emacs unquittably

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Message #26 received at 75520 <at> debbugs.gnu.org (full text, mbox):

From: Paul Eggert <eggert <at> cs.ucla.edu>
To: Pip Cet <pipcet <at> protonmail.com>
Cc: 75520 <at> debbugs.gnu.org,
 Mattias Engdegård <mattiase <at> acm.org>,
 Eli Zaretskii <eliz <at> gnu.org>, Andrea Corallo <acorallo <at> gnu.org>,
 Stefan Monnier <monnier <at> iro.umontreal.ca>
Subject: Re: bug#75520: Circular code or data can hang Emacs unquittably
Date: Sun, 12 Jan 2025 21:57:55 -0800

On 2025-01-12 13:46, Pip Cet wrote:
> This seems to be a common problem.  I did a quick git grep
> 'while.*CONSP':

Yes, I did something similar in 2017; see, for example, commit 
14dd9101ec4838f75addf25bf6b06ef33f8a7e97, which fixes 'length', 
'member', 'memq', etc. I don't remember how carefully I audited the code 
for the problem way back then. Either I missed several potential issues, 
or the code has changed since then, or both.

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