\input regression-test.tex
\documentclass{article}
\usepackage{osglistings}
\makeatletter
\newcommand\CheckLatexMinted{%
  \ifx\minted@executable@version\relax
    \TYPE{latexminted-unavailable}%
  \else
    \TYPE{latexminted-ok}%
  \fi}
\makeatother
\begin{document}
\START

% Multi-byte UTF-8 (Cyrillic comments/strings, chess-piece symbols) must
% survive inline source unchanged: no dropped or reordered glyphs. The
% default Latin Modern Mono font covers neither, so this exercises the
% \myFont/fvextra font hook, not just Pygments/lexing.
\OMIT
\begin{osglisting}[style=plain]{python}
# Привет, мир! Это комментарий.
def move():
    piece = "♞"  # knight
    print(piece + " до e5")
\end{osglisting}
\TIMO
\CheckLatexMinted
\TYPE{inline-utf8-ok}

\OMIT
\osglistinginput[style=plain]{c}{sample-utf8.c}
\TIMO
\TYPE{external-utf8-ok}

\END
\end{document}