[HarfBuzz] have markfiltersets ever worked?

[Khaled Hosny]

On Fri, Apr 01, 2016 at 10:30:43AM +0700, Martin Hosken wrote:
> Dear All,
> 
> Has anyone had any success with mark filter sets?

It used to work in the past, but I tried it now and does not seem to
work now.

Regards,
Khaled