[NTG-context] LMTX: request for \tracinglostchars=3

[Hans Hagen]

On 12/22/2022 4:23 PM, Leah Neukirchen via ntg-context wrote:
> Hi,
> 
> since TeX Live 2021 (TeX 3.141592653), there is
> 
>> - if \tracinglostchars >= 3, make missing characters an error (not just
>>    a log message), and always report the character code in hex.
> 
> LaTeX also enables this by default these days.

Not really our reference -)

> LMTX only seems to support =0 (ignore) and =1 (report).  Making these
> a fatal error (with exit status != 0) would be useful for automated
> typesetting, as missing characters easily can get lost in the logs,
> and then symbols are missing unnoticed in the output.

Will never be default, you can play with:

% \checkmissingcharacters
% \removemissingcharacters
% \replacemissingcharacters
% \handlemissingcharacters

> (However, \tracinglostchars=3 also doesn't seem to work with
> LuaTeX+MKIV, probably because there is code to fallback to other fonts?)
and if you want to quit:

\enabledirectives[logs.errors=missing characters]

Hans

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