Subject: bug#39554: 27.0.50; cairo not composing sequences

From: Eli Zaretskii <[email-masked]>
Date: Sat, 12 Feb 2022 08:50:27 +0200

> From: James Cloos <[email-masked]>
> Date: Fri, 11 Feb 2022 15:40:19 -0500
> Cc: Robert Pluim <[email-masked]>, [email-masked]
> 
> in this case one font is used.
> 
> w/ m17lib+libotf the two glyphs are combined and displayed one atop the other
> (ie, z-axis stacking).
> 
> w/ harfbuzz the two glyphs still are combined but displayed next to each other.
> (ie, x-axis stacking).
> 
> the first way is the correct way.  the latter is a bug.

_If_ it's a bug, it's either in the font or in HarfBuzz.  Not in Emacs.