Here's a small input file which for me produces a bus error when compiled with version 2.16.2 on OS X 10.7.5 (intel):
\version "2.16.2"
music = {
| d
}
\score {
<< \new Staff { \music } >>
}
\score {
\music
\midi {
\context {
\Score
midiInstrument = #"acoustic guitar (steel)"
}
}
}
If you remove the | bar-check, it no longer crashes.
This was happening in 2.14.x as well.
Regards,
-steve