[pdftex] \tracinglostchars

[Ross Moore]

Hi David, Karl and others

On 16 Feb 2021, at 1:10 pm, David Carlisle <davidc at nag.co.uk<mailto:davidc at nag.co.uk>> wrote:

On 15/02/2021 22:46, Karl Berry wrote:

As of the upcoming TL21, all engines except original TeX will have a
feature that if \tracinglostchars >= 3, the log-only message about
missing characters will be promoted to a full ! Error.  (Thanks to David
Jones of AMS for proposing and implementing this.)  --best, karl.



That will be really useful.  Thanks for the notice.

Agreed.
With the default input (at least for LaTeX) now UTF-8,
and the proliferation of fonts that people will be wanting to use,
the likelihood of missing characters has grown significantly.

However authors will need to know of this new setting,
and select it when appropriate, according to their input and font choices.

I don’t think that having this as default is desirable;
but it’s certainly good to have it as a possible setting.




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All the best.

Ross


Dr Ross Moore
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