[lucida] Odd bug with Lucida Bright Math OT, icomma and TeX Live 2015

[Vincent Goulet]

The following MWE worked as expected on TeX Live 2014:

\documentclass{article}
  \usepackage{icomma}
  \usepackage{fontspec}
  \usepackage{unicode-math}
  \setmathfont{Lucida Bright Math OT}

\begin{document}

\begin{displaymath}
  x = y + 2,
\end{displaymath}

\end{document}


With TeX Live 2015, compilation just hangs at the line with a comma in a displayed equation. Stopping the compilation yields

^C! Interruption.
,->\futurelet 
              \@let at token \sm at rtcomma 
l.10   x = y + 2,
                 
?

The comma does not cause problems with inline equations. Using package ncccomma instead of icomma fixes the problem.

v.