\batchmode
\documentclass{article}

\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage[xindy]{glossaries}

\makeglossaries

% This will fail:
\newglossaryentry{Überlingen}{name={Überlingen},
  description={a place}}

\begin{document}

\gls{Überlingen}

\printglossaries
\end{document}