SlantedFont and BoldSlantedFont unknown directives?

[kberry]

! LaTeX3 Error: The key 'fontspec-opentype/SlantedFont' is unknown and is being ignored. Ditto BoldSlantedFont.

But it seems they are not actually ignored, or perhaps there is default, since I see slanted where it's supposed to be in the output.

Happens with both lualatex-dev and xelatex-dev (and no -dev). Version: fontspec 2020/01/26 v2.7g

\documentclass{article}
\usepackage{fontspec}
\setmainfont{cmunrm.otf}
\begin{document}
\textsl{Slanted Text.}
\textbf{\textsl{Bold-Slanted Text.}}
\end{document}

With a cmunrm.fontspec file:

\defaultfontfeatures[cmunrm]
{
        Extension = .otf,
        UprightFont = cmunrm ,
        ItalicFont = cmunti ,
        %
        SlantedFont = cmunsl ,
        BoldSlantedFont = cmunbl ,
        %
        BoldFont = cmunbx ,
        BoldItalicFont = cmunbi ,
}

(specifying as optional argument to \setmainfont gets the same error.)

[wspr]

Hi Karl — I'm very confused. Can't reproduce...

[e-kwsm]

I can reproduce the issue on Debian 10.2.

[davidcarlisle]

@wspr I see same error lualatex(-dev) and xelatex(-dev)

This is XeTeX, Version 3.14159265-2.6-0.999991 (TeX Live 2019) (preloaded format=xelatex 2020.1.23)  28 JAN 2020 12:32
entering extended mode
 restricted \write18 enabled.
 %&-line parsing enabled.
**cc568
(./cc568.tex
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Document Class: article 2019/10/25 v1.4k Standard LaTeX document class
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Package: fontspec 2020/01/26 v2.7g Font selection for XeLaTeX and LuaLaTeX
 (/usr/local/texlive/2019/texmf-dist/tex/latex/fontspec/fontspec-xetex.sty
Package: fontspec-xetex 2020/01/26 v2.7g Font selection for XeLaTeX and LuaLaTe
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(/usr/local/texlive/2019/texmf-dist/tex/latex/base/fontenc.sty
Package: fontenc 2018/08/11 v2.0j Standard LaTeX package

(/usr/local/texlive/2019/texmf-dist/tex/latex/base/tuenc.def
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(/usr/local/texlive/2019/texmf-dist/tex/latex/fontspec/fontspec.cfg)
LaTeX Info: Redefining \itshape on input line 4128.
LaTeX Info: Redefining \slshape on input line 4128.
LaTeX Info: Redefining \scshape on input line 4128.
LaTeX Info: Redefining \upshape on input line 4128.
LaTeX Info: Redefining \em on input line 4128.
LaTeX Info: Redefining \emph on input line 4128.
))
(./cmunrm.fontspec)

! LaTeX3 Error: The key 'fontspec-opentype/SlantedFont' is unknown and is
(LaTeX3)        being ignored.

For immediate help type H <return>.
 ...                                              

l.4 \begin
          {document}
? x

Here is how much of TeX's memory you used:
 14560 strings out of 492472
 318431 string characters out of 6129298
 378048 words of memory out of 5000000
 19094 multiletter control sequences out of 15000+600000
 532386 words of font info for 30 fonts, out of 8000000 for 9000
 1348 hyphenation exceptions out of 8191
 45i,0n,73p,340b,2146s stack positions out of 5000i,500n,10000p,200000b,80000s
No pages of output.

[kberry]

It seems there is something very special about the name "cmunrm". If I rename the file to dmunrm.fontspec, change its first line to \defaultfontfeatures[dmunrm], and change the call in the .tex file to \setmainfont{dmunrm.otf}, it works. But with cmunrm in those three places, I get the error.

Furthermore, when I try with any other font family that uses [Bold]SlantedFont in its .fontspec file, namely erewhon, nimbusserif, ztm, scholax, XCharter, it works. Which explains why there have been no errors reported by other people.

@wspr I wonder if you have something in your system font setup which is somehow making it work. I can't imagine, but since all errors seem to come down to system fonts one way or another ... :)

I guess I'll have to turn tracing on next. Sigh.

[wspr]

@kberry I'm seeing the issue now. Apologies, I don't know why I didn't earlier. It turns out I have a hack in my code to avoid this error for the other font names and I left out Slanted and BoldSlanted. Of course I should fix my code so there is no hack, but it's late and as you say since the behaviour is correct the error is just spurious...

[kberry]

Thanks will! I look forward to trying this after rebuilding fmts tonight.

Spurious as it may be, the error makes a big difference for me, since my life revolves around make as well tex :), and the error means latex exits nonzero :( ... anyway, thanks again.