Error 'Invalid UTF-8 byte sequence' when using non-ascii characters in verbatim block

[anka-213]

MWE:

\documentclass{article}
\usepackage[utf8]{inputenc}
\begin{document}
\begin{verbatim}
Test åäö.
\end{verbatim}
\end{document}

\documentclass{article}
\usepackage[utf8]{inputenc}
\begin{document}
\begin{verbatim}
Test åäö.
Abc
\end{verbatim}
\end{document}

This generates

\documentclass{article}
%DIF LATEXDIFF DIFFERENCE FILE
%DIF DEL verbatim-nonascii-1.tex   Mon Jul 15 21:28:35 2024
%DIF ADD verbatim-nonascii-2.tex   Mon Jul 15 21:30:02 2024
\usepackage[utf8]{inputenc}
%DIF PREAMBLE EXTENSION ADDED BY LATEXDIFF
%DIF UNDERLINE PREAMBLE %DIF PREAMBLE
\RequirePackage[normalem]{ulem} %DIF PREAMBLE
\RequirePackage{color}\definecolor{RED}{rgb}{1,0,0}\definecolor{BLUE}{rgb}{0,0,1} %DIF PREAMBLE
\providecommand{\DIFadd}[1]{{\protect\color{blue}\uwave{#1}}} %DIF PREAMBLE
\providecommand{\DIFdel}[1]{{\protect\color{red}\sout{#1}}}                      %DIF PREAMBLE
%DIF SAFE PREAMBLE %DIF PREAMBLE
\providecommand{\DIFaddbegin}{} %DIF PREAMBLE
\providecommand{\DIFaddend}{} %DIF PREAMBLE
\providecommand{\DIFdelbegin}{} %DIF PREAMBLE
\providecommand{\DIFdelend}{} %DIF PREAMBLE
\providecommand{\DIFmodbegin}{} %DIF PREAMBLE
\providecommand{\DIFmodend}{} %DIF PREAMBLE
%DIF FLOATSAFE PREAMBLE %DIF PREAMBLE
\providecommand{\DIFaddFL}[1]{\DIFadd{#1}} %DIF PREAMBLE
\providecommand{\DIFdelFL}[1]{\DIFdel{#1}} %DIF PREAMBLE
\providecommand{\DIFaddbeginFL}{} %DIF PREAMBLE
\providecommand{\DIFaddendFL}{} %DIF PREAMBLE
\providecommand{\DIFdelbeginFL}{} %DIF PREAMBLE
\providecommand{\DIFdelendFL}{} %DIF PREAMBLE
%DIF COLORLISTINGS PREAMBLE %DIF PREAMBLE
\RequirePackage{listings} %DIF PREAMBLE
\RequirePackage{color} %DIF PREAMBLE
\lstdefinelanguage{DIFcode}{ %DIF PREAMBLE
%DIF DIFCODE_UNDERLINE %DIF PREAMBLE
  moredelim=[il][\color{red}\sout]{\%DIF\ <\ }, %DIF PREAMBLE
  moredelim=[il][\color{blue}\uwave]{\%DIF\ >\ } %DIF PREAMBLE
} %DIF PREAMBLE
\lstdefinestyle{DIFverbatimstyle}{ %DIF PREAMBLE
    language=DIFcode, %DIF PREAMBLE
    basicstyle=\ttfamily, %DIF PREAMBLE
    columns=fullflexible, %DIF PREAMBLE
    keepspaces=true %DIF PREAMBLE
} %DIF PREAMBLE
\lstnewenvironment{DIFverbatim}{\lstset{style=DIFverbatimstyle}}{} %DIF PREAMBLE
\lstnewenvironment{DIFverbatim*}{\lstset{style=DIFverbatimstyle,showspaces=true}}{} %DIF PREAMBLE
%DIF END PREAMBLE EXTENSION ADDED BY LATEXDIFF

\begin{document}
\DIFmodbegin
\begin{DIFverbatim}[alsolanguage=DIFcode]
Test åäö.
%DIF > Abc
\end{DIFverbatim}
\DIFmodend
\end{document}

The first two tex-files compile just fine, but when compiling the generated code I get the error:

! LaTeX Error: Invalid UTF-8 byte sequence (�\lst@EC�).

[anka-213]

Oh, I see, the issue is apparently with the listings package not being compatible with utf8 inputenc: https://tex.stackexchange.com/questions/24528/having-problems-with-listings-and-utf-8-can-it-be-fixed :(

[anka-213]

I managed to get it working with this version:

\documentclass{article}
\usepackage[utf8]{inputenc}
\usepackage{listings}
\lstset{
extendedchars=\true,
inputencoding=utf8
}
\begin{document}
\begin{verbatim}
Test åäö.
Abc
\end{verbatim}
\end{document}

[ftilmann]

Thanks for reporting and basically solving this, also. This fix is embedded by the commit.