GNU bug report logs - #44809
Say "Consider switching so-long mode on" when detecting long line files

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Package: emacs;

Reported by: 積丹尼 Dan Jacobson <jidanni <at> jidanni.org>

Date: Mon, 23 Nov 2020 01:05:01 UTC

Severity: minor

Merged with 44818

Found in version 27.0.91

Fixed in version 29.1

Done: Lars Ingebrigtsen <larsi <at> gnus.org>

Bug is archived. No further changes may be made.

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: 積丹尼 Dan Jacobson <jidanni <at> jidanni.org>
To: bug-gnu-emacs <at> gnu.org
Subject: One very long line of <中文> XML tags puts emacs
 out of business
Date: Mon, 23 Nov 2020 09:04:17 +0800

1. Visit https://data.gov.tw/dataset/34315 .
2. Download e.g., B臺中市 .
3. Unzip, and open one of the more whopping XML files,

$ ls -ogS Downloads/B_XML/ | head -n 5
-rw-r--r-- 1 3091875 2020-04-13  b_4602.xml
-rw-r--r-- 1 3087978 2020-04-13  b_0755.xml
-rw-r--r-- 1 2874539 2020-04-13  b_5709.xml
-rw-r--r-- 1 2829385 2020-04-13  b_0530.xml

Press M-> [end-of-buffer]. Now press M-<.

You'll see the combination of one very long line, UTF-8 tags (<國有>),
etc. causes emacs to, well, only be able to process C-g's and beep.

Before long one can only put it out of its misery with
$ killall -1 emacs.
emacs-version "27.1"
This bug report was last modified 2 years and 298 days ago.

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