GNU bug report logs - #64128
regexp parser zero-width assertion bugs

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Package: emacs;

Reported by: Mattias Engdegård <mattias.engdegard <at> gmail.com>

Date: Sat, 17 Jun 2023 12:21:02 UTC

Severity: normal

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Message #11 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Mattias Engdegård <mattias.engdegard <at> gmail.com>
To: Stefan Monnier <monnier <at> iro.umontreal.ca>
Cc: Emacs Bug Report <bug-gnu-emacs <at> gnu.org>, Paul Eggert <eggert <at> cs.ucla.edu>
Subject: Re: regexp parser zero-width assertion bugs
Date: Sat, 17 Jun 2023 22:07:56 +0200

17 juni 2023 kl. 20.44 skrev Stefan Monnier <monnier <at> iro.umontreal.ca>:

> I think the behavior that makes most sense is to signal an error when
> compiling the regexp.

Clearly, but some behaviour needs to be preserved for compatibility.
Regexps like "^*" aren't uncommon. Can it be generalised in a useful way?
This bug report was last modified 2 years and 2 days ago.

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