Wolfgang, thanks for looking into it! does this mean there is some bug in CONTEXT/LuaTeX font loading or something wrong with the font? i looked at the history on bitbucket mirror and the problem seems to have started when we moved from 2016-08-11 14:00:00 to 2016-08-15 22:45:00. the offending lines in tex/context/base/mkiv/font-ots.lua (line 3762) has kerns={ [1705]={ [2]={ 0, 0, -290, 0 }, }, [1707]={ [2]={ 0, 0, -290, 0 }, }, [1711]={ [2]={ 0, 0, -290, 0 }, }, [64400]={ [2]={ 0, 0, -290, 0 }, }, [64404]={ [2]={ 0, 0, -290, 0 }, }, [64469]={ [2]={ 0, 0, -290, 0 }, }, [65243]={ [2]={ 0, 0, -290, 0 }, }, [983071]={ [2]={ 0, 0, -290, 0 }, }, } and with k, v = 1705, { 0, 0, -290, 0 }, we want to dereference v[1][3], which leads to an error. prior to this change, the code was looking up v[3] (which would result in nil but no further dereferencing to cause an error). i checked that this part of the table was the same with the previous version (from 08-08). —MHB On Mon, Aug 22, 2016 at 11:45 AM, Wolfgang Schuster < schuster.wolfgang@gmail.com> wrote:

Mohammad Hossein Bateni 22. August 2016 um 17:01 Hello,

After the upgrade to latest beta (from 08.08 21:28), I cannot load many of my Persian fonts (one uploaded here http://mhbateni.com/context/bug-03/ for testing). It works on "current" without any issues but not on "beta". Find an MWE as well as the error message below. (I did test on a fresh standalone version as well.)

\starttext \definedfont[HMXNiloofar*arabic] Salam \stoptext

When I change the value from the "hasspacekerns" variable (after deleting hm-xniloofar.tmc) in hm-xniloofar.tma from true to false the font is loaded without errors.

hm-xniloofar.tma (line 7147 ff):

["properties"]={ ["hascolor"]=false, ["hasitalics"]=false, ["hasspacekerns"]=true, },

Wolfgang

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