[texhax] Bug in makeidx

[Rick Zaccone]

The following example illustrates what appears to be a bug in the
makeidx package.  The problem occurs if the index term contains a
tie. The \index command generates a different entry in the body and in
the footnote, resulting in two entries in the index.

\documentclass{article}
\usepackage{makeidx}
\makeindex
\begin{document}
foo bar\index{foo~bar}\footnote{foo bar\index{foo~bar}}
\printindex
\end{document}

This example produces the following .idx file:

\indexentry{foo~bar}{1}
\indexentry{foo\nobreakspace  {}bar}{1}

As a result, there are two entries in the index.  If I replace the tie
with a space, it works properly

Is this a bug, or am I missing something?

Rick