[HarfBuzz] Pre-base Vowel Following Cluster Used to be Rendered Afterwards

[Khaled Hosny]

On Tue, Jul 11, 2017 at 11:20:19PM +0100, 'Richard Wordingham' via Khaled Hosny wrote:
> This bug (https://github.com/behdad/harfbuzz/issues/180) was fixed on
> 17 December 2015.  It was present in at least HarfBuzz Versions 1.0.1
> and 1.1.2, and was gone in Version 1.1.3.
> 
> It's been annoying me in LibreOffice for some time now.  The problem is
> that I'm using a long-term-support version of Ubuntu, 16.04 Xenial.
> Xenial's distribution provides Version 1.0.1 of HarfBuzz - Package
> libharfbuzz0b Version 1.0.1-1ubuntu0.1 to be precise.  We can cite it
> for at least two living scripts, Balinese and Tai Tham (for Tai
> Khuen - example string is ᩉ᩠ᩅᩯᩁ /wɛːn/ 'ring (n.)').

This is out of HarfBuzz developers control. But what you can do is
backport the patch to 1.0.1 and convince Ubuntu to include it into their
package. The patch seems to apply almost cleanly to 1.0.1 with small conflict
in the test harness, so here is a backported version of the patch that
applies cleanly if it is of any help (you can also setup a PPA with the
patched version if you couldn’t convince Ubuntu maintainers).

Regards,
Khaled
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