GNU bug report logs - #57207
29.0.50; Fontification is slow after e7b5912b23 (Improvements to long lines handling)

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Package: emacs;

Reported by: Ihor Radchenko <yantar92 <at> gmail.com>

Date: Sun, 14 Aug 2022 15:55:01 UTC

Severity: normal

Found in version 29.0.50

Done: Gregory Heytings <gregory <at> heytings.org>

Bug is archived. No further changes may be made.

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Message #110 received at 57207 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Lars Ingebrigtsen <larsi <at> gnus.org>
Cc: 57207 <at> debbugs.gnu.org, yantar92 <at> gmail.com
Subject: Re: bug#57207: 29.0.50; Fontification is slow after e7b5912b23
 (Improvements to long lines handling)
Date: Thu, 18 Aug 2022 16:23:01 +0300

> From: Lars Ingebrigtsen <larsi <at> gnus.org>
> Cc: yantar92 <at> gmail.com,  57207 <at> debbugs.gnu.org
> Date: Thu, 18 Aug 2022 15:02:15 +0200
> 
> If I do the following in this running Emacs:
> 
> C-x C-f /tmp/empty-file.txt
> M-: (insert (propertize (make-string 20000 ?x) 'display "foo"))
> 
> Then hit RET a couple of times, and then type any key (like `d'), the
> mode line starts saying "Narrow".  If I hit it again, it switches off,
> and then hitting it again switches it on again.

Can you attach a debugger to this session, and produce a C and Lisp
backtrace from Fnarrow_to_region and Fwiden when you do the above?
This bug report was last modified 2 years and 169 days ago.

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