From: Stefan Monnier via "Bug reports for GNU Emacs, the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
To: "Mattias Engdegård" <mattias.engdegard@gmail.com>
Cc: Eli Zaretskii <eliz@gnu.org>, Paul Eggert <eggert@cs.ucla.edu>,
64128@debbugs.gnu.org
Subject: bug#64128: regexp parser zero-width assertion bugs
Date: Mon, 19 Jun 2023 16:08:57 -0400 [thread overview]
Message-ID: <jwv5y7jw74n.fsf-monnier+emacs@gnu.org> (raw)
In-Reply-To: <48D53EC3-4335-4E88-98C1-4A74423E6ACB@gmail.com> ("Mattias Engdegård"'s message of "Mon, 19 Jun 2023 21:52:40 +0200")
>> If I understand things correctly, this would cause "\b*c" to be treated like "\b\*c".
> Actually it already works that way. What the patch does, is preventing
> AB\b*C from being treated as \(?:AB\b\)*C but as AB\b\*C instead, which
> I think we can all agree is less wrong.
Hmm... maybe it's less wrong, but I'd rather make it behave like
AB\(\b\)*C, which is, I'd argue, even less wrong.
Or maybe make it signal an error: I can't imagine that the current
behavior is used by very much code at all, seeing how it's so
seriously non-intuitive.
Stefan
next prev parent reply other threads:[~2023-06-19 20:08 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-06-17 12:20 bug#64128: regexp parser zero-width assertion bugs Mattias Engdegård
2023-06-17 18:44 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-06-17 20:07 ` Mattias Engdegård
2023-06-17 22:18 ` Paul Eggert
2023-06-18 4:55 ` Eli Zaretskii
2023-06-18 20:26 ` Mattias Engdegård
2023-06-19 3:04 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-06-19 8:44 ` Mattias Engdegård
2023-06-19 12:54 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-06-19 18:34 ` Mattias Engdegård
2023-06-19 19:21 ` Paul Eggert
2023-06-19 19:52 ` Mattias Engdegård
2023-06-19 20:08 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors [this message]
2023-06-20 11:36 ` Mattias Engdegård
2023-06-21 6:08 ` Paul Eggert
2023-06-21 15:57 ` Mattias Engdegård
2023-06-19 20:40 ` Paul Eggert
2023-06-19 18:14 ` Paul Eggert
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