[HarfBuzz] Windows 10 monbaiti.ttf upgrade (5.01 -> 5.51) caused loss of diacritical marks when shaped with harfbuz

[Behdad Esfahbod]

On 15-12-04 07:51 PM, Jonathan Kew wrote:
> Whether this is a deliberate change, a font bug, or harfbuzz mis-applying the
> lookups in some way is not yet clear to me.

We should definitely ask Microsoft before making any changes.  My testing with
the font confirms your conclusions.  Maybe they removed 'calt' from features
that are applied to Mongolian in Windows 10...  Anyway, sad that they broke it
like this.

b