latex or l3 changes in 2020: starting to request tcrm fonts?

[Joseph Wright]

On 13/02/2020 03:47, Norbert Preining wrote:
> Hi all,
> 
> it seems that one of the recent changes in some of the latex/l3 packages has
> triggered a new dependency (implicit): When compiling a document without
> collection-fontsrecommended installed, it still requests the tcrm fonts:
> 	This is pdfTeX, Version 3.14159265-2.6-1.40.20 (TeX Live 2019/Debian) (preloaded format=latex)
> 	 restricted \write18 enabled.
> 	entering extended mode
> 	(./main.tex
> 	LaTeX2e <2020-02-02> patch level 1
> 	L3 programming layer <2020-02-08>
> 	(/usr/share/texlive/texmf-dist/tex/latex/base/article.cls
> 	Document Class: article 2019/12/20 v1.4l Standard LaTeX document class
> 	(/usr/share/texlive/texmf-dist/tex/latex/base/size12.clo))
> 	(/usr/share/texlive/texmf-dist/tex/latex/base/inputenc.sty)
> 	(/usr/share/texlive/texmf-dist/tex/latex/preprint/fullpage.sty)
> 	(/usr/share/texmf/tex/latex/misc/ocamlweb.sty)
> 	(/usr/share/texlive/texmf-dist/tex/latex/l3backend/l3backend-dvips.def)
> 	kpathsea: Running mktextfm tcrm1200
> 	/usr/share/texlive/texmf-dist/web2c/mktexnam: Could not map source abbreviation  for tcrm1200.
> 	/usr/share/texlive/texmf-dist/web2c/mktexnam: Need to update ?
> 	mktextfm: Running mf-nowin -progname=mf \mode:=ljfour; mag:=1; nonstopmode; input tcrm1200
> 
> This is by itself not a problem, only that it is new and breaks building
> of some Debian packages that didn't require collection-fontsrecommended
> till now, and suddently need them.
> 
> Is this a known "feature"/issue?
> 
> Best
> 
> Norbert

I've just tried a simple document

\documentclasss{article}
\usepacage{fullpage}
\begin{document}
Hello world
\end{document}

(I can't see ocamlweb.sty in TeX Live)

and get no issue with pdflatex or latex on my VM with a truly minimal 
installation, with "tlmgr list --only-installed" reporting

babel
cm
dehyph
etex
hyphen-base
knuth-lib
kpathsea (+ binaries)
l3backend
l3kernel
latex (+ binaries)
latex-fonts
latexconfig
lm
lualibs
luaotfload (+ binaries)
luatex (+ binaries)
pdftex (+ binaries)
plain
preprint
scheme-infra-only
tex-ini-files
texlive-scripts (+ binaries)
texlive.infra (+ binaries)
unicode-data

Could you provide a full example for testing?

Joseph