bug#39554: 27.0.50; cairo not composing sequences

[Lars Ingebrigtsen]

Robert Pluim <rpluim@gmail.com> writes:

> I donʼt see the issue with DejaVu Sans Mono in an Xft build, and
> can reproduce it in an Xft+Harfbuzz build, so Cairo is not to blame
> here.

(I'm going through old bug reports that unfortunately weren't resolved
at the time.)

This looks very similar to the problem in bug#44784, and the issue there
was that Emacs was choosing a font for ̷ that's not the same as the font
used for 0 -- in that case Emacs doesn't combine chars.  So it's a
matter of choosing a font that has wider coverage, I think.

-- 
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   bloggy blog: http://lars.ingebrigtsen.no