\documentclass{minimal}
\begin{document}

THIS DOCUMENT DOES NOT COMPILE!

\setmainfont{LucidaBrightOT}[
  Extension = .otf,
  BoldItalicFont = *-DemiItalic
]

\begin{helloworld}[
  Extension = .otf,
  BoldItalicFont = *-DemiItalic
]
\end{helloworld}

\begin{textblock*}{3in}[0,0] (3in,1in)
  Hello world
\end{textblock*}

\test \foo(bar)

\end{document}
