[XeTeX] texlive13/harfbuzz problem with nastaleeq font

[Khaled Hosny]

On Sat, Jun 22, 2013 at 04:26:28PM -0400, Kamal Abdali wrote:
> The files using a nastaleeq font (Jameel Noori Nstaleeq) which were
> processed quite well under texlive12/xelatex/polyglossia are being typeset
> with lots of very overfull lines under texlive13. I tried various settings
> of the fontspec WordSpace option, \pretolerance, etc, but they didn't
> improve the output. The same files are still typeset in TL13 very nicely
> when I switch to a naskh font (XB Zar).
> 
> Attached are a source file and its pdf outputs with nastaleeq font in TL 12
> & 13 and with naskh font in TL13. I'm sorry the files are long but shorter
> files didn't illustrate the problem well. I'll provide links to the fonts
> if a solution doesn't suggest itself to some expert by just looking at the
> files here.

What happens if you omit the WordSpace option? Either way, the font is
needed for any meaningful testing.

Regards,
Khaled