GNU bug report logs - #65726
29.1.50; Crash in regexp engine

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Package: emacs;

Reported by: martin rudalics <rudalics <at> gmx.at>

Date: Mon, 4 Sep 2023 07:48:02 UTC

Severity: normal

Found in version 29.1.50

Fixed in version 30.1

Done: Stefan Kangas <stefankangas <at> gmail.com>

Bug is archived. No further changes may be made.

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Message #106 received at 65726 <at> debbugs.gnu.org (full text, mbox):

From: Stefan Monnier <monnier <at> iro.umontreal.ca>
To: Mattias Engdegård <mattias.engdegard <at> gmail.com>
Cc: martin rudalics <rudalics <at> gmx.at>, Eli Zaretskii <eliz <at> gnu.org>,
 65726 <at> debbugs.gnu.org
Subject: Re: bug#65726: 29.1.50; Crash in regexp engine
Date: Sat, 16 Sep 2023 11:48:02 -0400

> I think you are right, but wouldn't mind seeing it confirmed
> empirically. Say, by cross-checking using an an alternative (slower)
> implementation that directly checks whether a node has been visited before.

I'm reworking my code so it takes 2 arguments: the loop-entry and the
loop-exit.  Any jump outside of those bounds should never happen so we
can assert it to check that our assumptions are right (and we can
return false when we don't compile assertions, so it's never over-optimistic).


        Stefan
This bug report was last modified 1 year and 242 days ago.

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