LuaTeX has problems with certain unicode characters

[Kees Zeelenberg]

> -----Oorspronkelijk bericht-----
> Van: lyx-users <lyx-users-bounces at lists.lyx.org> Namens Bernd via lyx-users
> Verzonden: zaterdag 27 juli 2024 16:55
> Aan: lyx-users at lists.lyx.org
> Onderwerp: LuaTeX has problems with certain unicode characters
> 
> Dear list,
> 
> I noticed that LuaTeX has problems with certain unicode characters in LyX 2.4.1.
> 
> So far, the list contains U+0361, U+034F, U+2E3A, U+2E3B.
> 
>      "LaTeX Error: Unicode character [...} not set up for use with LaTeX."
> 
> As XeTeX is greyed out now, I cannot test if it has a problem as well.
> 
> Is it a bug?
> 
> Kind regards,
> 
> Bernd
> ...

When I compile a simple LyX-document with symbol U+0361  (Combining Double Inverted Breve) and the default fonts (LM), the result are error messages "Missing glyphs" and  "Missing character: There is no ͡ (U+0361) in font [lmroman10-regular]:+tlig;!". But with a font such as Calibri, which has an extensive set of Unicode glyphs, it compiles into a correct pdf. 
So perhaps it is useful to check whether the font that is actually used, contains the required symbols.

Kees

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