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bug#28312: 25.2; Arabic script changes when scrolling

From: Andreas Schwab
Subject: bug#28312: 25.2; Arabic script changes when scrolling
Date: Fri, 01 Sep 2017 10:16:06 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/25.2 (gnu/linux)

On Sep 01 2017, YAMAMOTO Mitsuharu <address@hidden> wrote:

> I could reproduce a similar effect also on Darwin, but a different
> font backend driver (xft with libotf 0.9.3, m17n lib/db 1.7.0).
> 1. emacs -Q &
> 2. M-x describe-language-environment RET Arabic RET
> 3. Press and release the mouse button around the Arabic sample text.
>    (say, "Arabic" to the left)
> The appearance of the sample text changes if I press the button, and
> it changes back again when I release it.

I see such an effect if I start a (highlighted) region anywhere before
the arabic sample text.  The appearance changes while changing the
extend of the region.


Andreas Schwab, address@hidden
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