notail + slur bug

[Rob Platt]

Hello!

The input file below gives ten 'Infinity or NaN' errors, and a slur
isn't produced correctly. Viewing the dvi file in xdvi, there is no
slur but there does seem to be a squiggly line behind one of the
notes. This example is admittedly rather contrived but I decided to
produce as simple a test case as possible. Exactly ten 'Infinity or
NaN' errors are also being produced by more practical, complex cases.

-----begin input file ---------------
noFlag = \once \override Stem #'flag-style = #'no-flag
                
\new Voice {
  \clef bass
  << { a4( \noFlag g8) } \\ { b,4 e8 } >> r8
}
-----end input file ---------------

I'm running lilypond 2.4.2 on Slackware 10.0 (using the packages
available at www.linuxpackages.net)

With Regards
Rob