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From: Stefan Kangas <stefan@marxist.se>
To: Eli Zaretskii <eliz@gnu.org>
Cc: acm@muc.de, schwab@linux-m68k.org, monnier@iro.umontreal.ca,
	18577@debbugs.gnu.org
Subject: bug#18577: Regexp I-search: [(error Stack overflow in regexp matcher)]
Date: Sat, 23 Oct 2021 01:30:07 -0700	[thread overview]
Message-ID: <CADwFkm=13XMNB3gRkAp0D_TE0d1Wa4OGN2y_QPkMKGVLtXiORw@mail.gmail.com> (raw)
In-Reply-To: <83mtn05h7b.fsf@gnu.org> (Eli Zaretskii's message of "Sat, 23 Oct 2021 10:32:56 +0300")

Eli Zaretskii <eliz@gnu.org> writes:

>> From: Stefan Kangas <stefan@marxist.se>
>> Date: Fri, 22 Oct 2021 19:47:53 -0700
>> Cc: Alan Mackenzie <acm@muc.de>, Andreas Schwab <schwab@linux-m68k.org>,
>>  18577@debbugs.gnu.org
>>
>> Should we do anything about this, like document it in etc/PROBLEMS, or
>> should this bug just be closed?
>
> If we can give useful advice in PROBLEMS, adding that can never hurt.

Perhaps we could just say this (which makes it easy to search for as the
headline matches the error message):

diff --git a/etc/PROBLEMS b/etc/PROBLEMS
index ede83a6e7c..1b10e20272 100644
--- a/etc/PROBLEMS
+++ b/etc/PROBLEMS
@@ -742,6 +742,15 @@ completed" message that tls.el relies upon,
causing affected Emacs
 functions to hang.  To work around the problem, use older or newer
 versions of gnutls-cli, or use Emacs's built-in gnutls support.

+*** Stack overflow in regexp matcher.
+Due to fundamental limitations in the way Emacs' regular expression
+engine is designed, you might run into combinatorial explosions in
+backtracking with certain regexps.
+
+See Emacs Bug#18577 for a discussion and ideas for how to solve it:
+
+    https://debbugs.gnu.org/18557
+
 * Runtime problems related to font handling

 ** Characters are displayed as empty boxes or with wrong font under X.





  reply	other threads:[~2021-10-23  8:30 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-09-28  8:55 bug#18577: Regexp I-search: [(error Stack overflow in regexp matcher)] Alan Mackenzie
2014-09-28 10:56 ` Andreas Schwab
2014-09-28 12:37   ` Alan Mackenzie
2014-09-28 12:48     ` Andreas Schwab
2014-09-28 17:35       ` Stefan Monnier
2014-11-27  8:44         ` Tassilo Horn
2021-10-23  2:47         ` Stefan Kangas
2021-10-23  7:32           ` Eli Zaretskii
2021-10-23  8:30             ` Stefan Kangas [this message]
2021-10-23  8:39               ` Eli Zaretskii
2021-10-23  9:32                 ` Stefan Kangas
2021-10-23 11:27                   ` Eli Zaretskii
2021-10-24 22:08                     ` Stefan Kangas

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