GNU bug report logs - #81648
32.0.50; Running LaTeX on files with non-ASCII chars in the name

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Package: emacs; Reported by: Arash Esbati <arash@HIDDEN>; dated Tue, 18 Aug 2026 09:45:02 UTC; Maintainer for emacs is bug-gnu-emacs@HIDDEN.

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From: Sean Whitton <spwhitton@HIDDEN>
To: Arash Esbati <arash@HIDDEN>, 81648 <at> debbugs.gnu.org
Subject: Re: bug#81648: 32.0.50; Running LaTeX on files with non-ASCII chars
 in the name
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Arash Esbati [18/Aug 11:43am +02] wrote:
> X-Debbugs-CC: Stefan Monnier <monnier@HIDDEN>
>
> Hi all,
>
> compiling LaTeX files with non-ASCII characters in their file names
> fails.   Steps to reproduce:

Does the same pdflatex command work at the command line?

-- 
Sean Whitton




Information forwarded to bug-gnu-emacs@HIDDEN:
bug#81648; Package emacs. Full text available.

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From: Arash Esbati <arash@HIDDEN>
To: "emacs-bugs" <bug-gnu-emacs@HIDDEN>
Subject: 32.0.50; Running LaTeX on files with non-ASCII chars in the name
Date: Tue, 18 Aug 2026 11:43:55 +0200
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--=-=-=
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X-Debbugs-CC: Stefan Monnier <monnier@HIDDEN>

Hi all,

compiling LaTeX files with non-ASCII characters in their file names
fails.   Steps to reproduce:

=E2=80=A2 Save the file attached in a temp directory
=E2=80=A2 Start Emacs as 'emacs -Q'
=E2=80=A2 Open the file and hit 'C-c C-c RET' or 'C-c C-f' to compile
=E2=80=A2 This is what I see after 'C-c C-c RET':

--8<---------------cut here---------------start------------->8---
$ pdflatex  \\nonstopmode\\input \=C3=A4.tex
This is pdfTeX, Version 3.141592653-2.6-1.40.29 (TeX Live 2026) (preloaded =
format=3Dpdflatex)
 restricted \write18 enabled.
entering extended mode
LaTeX2e <2026-06-01>
L3 programming layer <2026-08-10>

(/usr/local/texlive/2026/texmf-dist/tex/latex/tools/.tex File ignored)

! LaTeX Error: Missing \begin{document}.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=
=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20
=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=
=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20
<*> \nonstopmode\input =C3=A4
                         .tex

LaTeX Font Warning: Font shape `/cmr/m/n' undefined
(Font)              using `/cmr/m/n' instead on input line 0.

! Corrupted NFSS tables.
wrong@fontshape ...message {Corrupted NFSS tables}
                                                  error@fontshape else let =
f...
<*> \nonstopmode\input =C3=A4
                         .tex

LaTeX Font Warning: Font shape `/cmr/m/n' undefined
(Font)              using `OT1/cmr/m/n' instead on input line 0.

Missing character: There is no . in font nullfont!
Missing character: There is no t in font nullfont!
Missing character: There is no e in font nullfont!
Missing character: There is no x in font nullfont!
! Emergency stop.
<*> \nonstopmode\input =C3=A4.tex
=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=
=20=20=20=20
!  =3D=3D> Fatal error occurred, no output PDF file produced!
Transcript written on .log.
--8<---------------cut here---------------end--------------->8---

This is on macOS; same on GNU/Linux as confirmed here[1].

Best, Arash


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Footnotes:
[1]  https://lists.gnu.org/archive/html/bug-gnu-emacs/2026-08/msg00960.html

--=-=-=--




Acknowledgement sent to Arash Esbati <arash@HIDDEN>:
New bug report received and forwarded. Copy sent to monnier@HIDDEN, bug-gnu-emacs@HIDDEN. Full text available.
Report forwarded to monnier@HIDDEN, bug-gnu-emacs@HIDDEN:
bug#81648; Package emacs. Full text available.
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