GNU bug report logs - #41626
28.0.50; activating mark breaks RTL shaping in etc/HELLO (auto-composition-mode)

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Package: emacs;

Reported by: Pip Cet <pipcet <at> gmail.com>

Date: Sun, 31 May 2020 10:04:01 UTC

Severity: normal

Found in version 28.0.50

Done: Pip Cet <pipcet <at> gmail.com>

Bug is archived. No further changes may be made.

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Message #17 received at 41626 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Pip Cet <pipcet <at> gmail.com>
Cc: contovob <at> tcd.ie, 41626 <at> debbugs.gnu.org
Subject: Re: bug#41626: 28.0.50;
 activating mark breaks RTL shaping in etc/HELLO
 (auto-composition-mode)
Date: Sun, 31 May 2020 17:59:26 +0300

> From: Pip Cet <pipcet <at> gmail.com>
> Date: Sun, 31 May 2020 13:10:47 +0000
> Cc: 41626 <at> debbugs.gnu.org
> 
> What I don't understand is why it works in pure RTL paragraphs,
> though. If I yank the Arabic greeting into a new buffer, I can place
> the mark anywhere and nothing happens to the shaping.

Because testing where the face changes while going backwards in a
buffer is "tricky".  See handle_stop_backwards and its callers.  Maybe
there's some bug in the logic there, I don't know.
This bug report was last modified 4 years and 352 days ago.

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