GNU bug report logs - #42522
Emacs 27: 100% CPU when setting mode-name with ligatures

Previous Next

Package: emacs;

Reported by: Evan Moses <emoses <at> gmail.com>

Date: Fri, 24 Jul 2020 22:30:01 UTC

Severity: normal

Done: Stefan Kangas <stefan <at> marxist.se>

Bug is archived. No further changes may be made.

Full log

View this message in rfc822 format

From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Evan Moses <emoses <at> gmail.com>
Subject: bug#42522: closed (Re: bug#42522: Emacs 27: 100% CPU when setting
 mode-name with ligatures)
Date: Thu, 13 Aug 2020 16:55:02 +0000

[Message part 1 (text/plain, inline)]
Your bug report

#42522: Emacs 27: 100% CPU when setting mode-name with ligatures

which was filed against the emacs package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 42522 <at> debbugs.gnu.org.

-- 
42522: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=42522
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

[Message part 2 (message/rfc822, inline)]
From: Stefan Kangas <stefan <at> marxist.se>
To: Evan Moses <emoses <at> gmail.com>
Cc: 42522-done <at> debbugs.gnu.org, Eli Zaretskii <eliz <at> gnu.org>,
 Robert Pluim <rpluim <at> gmail.com>
Subject: Re: bug#42522: Emacs 27: 100% CPU when setting mode-name with
 ligatures
Date: Thu, 13 Aug 2020 09:54:50 -0700

Evan Moses <emoses <at> gmail.com> writes:

> Seems to work fine now; Thanks!

Thanks.  I'm therefore closing this bug report.

Best regards,
Stefan Kangas


[Message part 3 (message/rfc822, inline)]
From: Evan Moses <emoses <at> gmail.com>
To: bug-gnu-emacs <at> gnu.org
Subject: Emacs 27: 100% CPU when setting mode-name with ligatures
Date: Fri, 24 Jul 2020 14:35:50 -0700

[Message part 4 (text/plain, inline)]
Emacs version: GNU Emacs 27.0.91 (build 1, x86_64-apple-darwin18.7.0, NS
appkit-1671.60 Version 10.14.6 (Build 18G5033)) of 2020-07-24
Built d5acc509415869bce22c49ae311f2960494a0bdc locally


To reproduce, evaluate this

(set-char-table-range composition-function-table 47
'([".\\(?:\\(?:\\*\\*\\|//\\|==\\)\\|[*/=>]\\)" 0 font-shape-gstring]))

And then evaluate

(setq mode-name "test//")

Emacs will become unresponsive and consume 100% CPU.

-- 
Evan Moses
emoses <at> gmail.com

[Message part 5 (text/html, inline)]
This bug report was last modified 4 years and 340 days ago.

Previous Next

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.