bug#54188: Crash when eval-ing font test elisp code

[Eli Zaretskii]

> Date: Tue, 1 Mar 2022 23:51:11 +0200
> Cc: 54188@debbugs.gnu.org
> From: Vordoo <vordoo@yahoo.com>
> 
> On 3/1/22 22:33, Eli Zaretskii wrote:
> > Do you have all the 4 fonts of the Charter family (regular,
> > italic. bold, bold-italic) installed?  Or just some of them.
> >
> > And what version of that family do you have installed?
> 
> fc-list shows non.
> 
> 
> (font-family-list) shows:  "charter"
> 
> 
> These find outputs where installed by texlive-core 2021.61403-1:
> 
> =================================================
> 
> /usr/share/texmf-dist/fonts/map/dvips/psnfss/charter.map
> /usr/share/texmf-dist/fonts/map/dvips/cs/cs-charter.map
> /usr/share/texmf-dist/fonts/map/dvips/vntex/chartervn.map
> /usr/share/texmf-dist/tex/plain/font-change/font_charter.tex
> /usr/share/texmf-dist/tex/context/fonts/mkiv/type-imp-charter.mkiv
> /usr/share/texmf-dist/tex/context/third/typescripts/type-imp-itccharter.mkiv
> /usr/share/texmf-dist/tex/csplain/fonts/cs-charter.tex
> /usr/share/texmf-dist/tex/latex/psnfss/charter.sty
> /usr/share/texmf-dist/tex/optex/base/f-xcharter.opm
> /usr/share/texmf-dist/tex4ht/ht-fonts/alias/t1fonts/XCharter-Bold-tlf-t1.htf
> /usr/share/texmf-dist/tex4ht/ht-fonts/alias/t1fonts/XCharter-Bold-tosf-sc-t1.htf
> /usr/share/texmf-dist/tex4ht/ht-fonts/alias/t1fonts/XCharter-BoldItalic-sup-t1.htf
> /usr/share/texmf-dist/tex4ht/ht-fonts/alias/t1fonts/XCharter-BoldItalic-tlf-sc-t1.htf
> /usr/share/texmf-dist/tex4ht/ht-fonts/alias/t1fonts/XCharter1-Roman-tosf-t1.htf
> /usr/share/texmf-dist/tex4ht/ht-fonts/alias/t1fonts/XCharter-BoldItalic-tosf-t1.htf
> /usr/share/texmf-dist/tex4ht/ht-fonts/alias/t1fonts/XCharter1-Roman-tosf-sc-t1.htf
> /usr/share/texmf-dist/tex4ht/ht-fonts/alias/t1fonts/XCharter-Italic-tlf-sc-t1.htf
> /usr/share/texmf-dist/tex4ht/ht-fonts/alias/t1fonts/XCharter-BoldItalic-tlf-t1.htf
> /usr/share/texmf-dist/tex4ht/ht-fonts/alias/t1fonts/XCharter1-BoldItalic-tosf-sc-t1.htf
> /usr/share/texmf-dist/tex4ht/ht-fonts/alias/t1fonts/XCharter-Roman-tosf-sc-t1.htf
> /usr/share/texmf-dist/tex4ht/ht-fonts/alias/t1fonts/XCharter1-BoldItalic-tosf-t1.htf
> /usr/share/texmf-dist/tex4ht/ht-fonts/alias/t1fonts/XCharter1-Italic-tosf-t1.htf
> /usr/share/texmf-dist/tex4ht/ht-fonts/alias/t1fonts/XCharter-Italic-tlf-t1.htf
> /usr/share/texmf-dist/tex4ht/ht-fonts/alias/t1fonts/XCharter-Roman-tlf-t1.htf
> /usr/share/texmf-dist/tex4ht/ht-fonts/alias/t1fonts/XCharter-Bold-tlf-sc-t1.htf
> /usr/share/texmf-dist/tex4ht/ht-fonts/alias/t1fonts/XCharter-Bold-tlf-t1--base.htf
> /usr/share/texmf-dist/tex4ht/ht-fonts/alias/t1fonts/XCharter-Italic-sup-t1.htf
> /usr/share/texmf-dist/tex4ht/ht-fonts/alias/t1fonts/XCharter-Roman-tosf-t1.htf
> /usr/share/texmf-dist/tex4ht/ht-fonts/alias/t1fonts/XCharter-Italic-tosf-t1.htf
> /usr/share/texmf-dist/tex4ht/ht-fonts/alias/t1fonts/XCharter1-Bold-tosf-sc-t1.htf
> /usr/share/texmf-dist/tex4ht/ht-fonts/alias/t1fonts/XCharter-Roman-sup-t1.htf
> /usr/share/texmf-dist/tex4ht/ht-fonts/alias/t1fonts/XCharter-Italic-tlf-t1--base.htf
> /usr/share/texmf-dist/tex4ht/ht-fonts/alias/t1fonts/XCharter1-Bold-tosf-t1.htf
> /usr/share/texmf-dist/tex4ht/ht-fonts/alias/t1fonts/XCharter-Roman-tlf-t1--base.htf
> /usr/share/texmf-dist/tex4ht/ht-fonts/alias/t1fonts/XCharter-Bold-sup-t1.htf
> /usr/share/texmf-dist/tex4ht/ht-fonts/alias/t1fonts/XCharter-Bold-tosf-t1.htf
> /usr/share/texmf-dist/tex4ht/ht-fonts/alias/t1fonts/XCharter1-Italic-tosf-sc-t1.htf
> /usr/share/texmf-dist/tex4ht/ht-fonts/alias/t1fonts/XCharter-Italic-tosf-sc-t1.htf
> /usr/share/texmf-dist/tex4ht/ht-fonts/alias/t1fonts/XCharter-Roman-tlf-sc-t1.htf
> /usr/share/texmf-dist/tex4ht/ht-fonts/alias/t1fonts/XCharter-BoldItalic-tosf-sc-t1.htf

What are *.htf font files?  Are they OpenType fonts, or are they
something else?  "t1fonts" seem to say they are Type1 fonts or
something?  Does anyone here know what they are?

I didn't know Emacs can use TeXLive fonts, and I have no idea what
that means for our font-handling code.  Maybe the cause of the crash
is that Type1 fonts cause some problems?