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From: "Mark McGregor" <mark DOT mcgregor AT gmx DOT de>
To: cygwin AT cygwin DOT com
Subject: xdvipdfmx:fatal: This font using the "seac" command for accented characters...
Content-Type: text/plain; charset=UTF-8
Date: Mon, 13 Jun 2016 02:08:00 +0200
Sensitivity: Normal
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A more minimal non-working example:

[
\documentclass{article}
\usepackage{fontspec}

\setmainfont{CMU Serif}
%\setmainfont{cmunrm.otf}

\begin{document}
А
\end{document}
]

If you comment the first \setmainfont line and uncomment the second one, the file compiles. Rerunning /usr/bin/texlive-enable-fontconfig doesn't help.

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