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bug#28312: 25.2; Arabic script changes when scrolling


From: Alexis
Subject: bug#28312: 25.2; Arabic script changes when scrolling
Date: Fri, 01 Sep 2017 18:01:22 +1000
User-agent: mu4e 0.9.19; emacs 25.2.1


YAMAMOTO Mitsuharu <address@hidden> writes:

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.

Confirmed on locally compiled Emacs 25.2.1 on Debian Stretch x86_64;
xft with libotf 0.9.13-3+b1 and m17n 1.7.0-3+b1.

The font used for displaying Arabic characters is "Arial Unicode MS".

Here it's "DejaVu Sans Mono".


Alexis.





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