Am 30.10.22 um 16:54 schrieb Hans Hagen via ntg-context:
> On 10/30/2022 4:43 PM, Henning Hraban Ramm via ntg-context wrote:
>> This used to work:
>>
>> \definefontfallback[seguiFB]
>>    [file:seguisym.ttf]
>>    [0x00000-0xFFFFF]
>>    [check=yes,force=no]
>>
>> \definetypeface [contextstart] [ss] [sans]  [segoe] 
>> [default][fallbacks=seguiFB]
>>
>> (Intention is to take all missing characters from this symbol font.)
>>
>>
>> But with current LMTX, I get:
>>
>>
>>
>> tex error       > tex error on line 48 in file env_contextstart.tex:
>>
>> lua error:
>>
>>      registered function call [1145]: 
>> ...-14/tex/texmf-context/tex/context/base/mkxl/math-act.lmt:2339: 
>> attempt to perform arithmetic on a nil value (field 'depth')
> Your example is too minimal so i can't test it. Do you also set those 
> fallbacks on a math font (as the error has to do with math fallbacks).

Ok, find attached a quite minimal example.

Yes, I had the fallback activated for math (since some enumeration 
symbols were missing), but I get an error also without math.

> Btw, 0x00000-0xFFFFF is a bit over the top,

Well, if I want to replace all missing characters without thinking too 
much which that might be?

Hraban