Re: use of Ambitus_engraver in DrumStaff causes program crash

[Graham Percival]

On Sun, Jan 11, 2009 at 12:26:08AM +0000, Neil Puttock wrote:
> Hi Jesse,
> 
> 2009/1/10 Jesse Engle <address@hidden>:
> >> I'm not top posting.
> >
> > % use of Ambitus_engraver in DrumStaff causes program crash
> >
> Percussion noteheads are unpitched, so you shouldn't expect ambitus to
> work in this situation.
> 
> The crash occurs because the Ambitus_engraver tries to retrieve a
> non-existent pitch from the notehead, causing a segmentation fault.

That's not the point -- lilypond should not crash, no matter what
the input*.  This is a high-priority bug.

[*] assuming that there's no explicit scheme involved.  Scheme
could certainly produce an infinite loop, and may even crash stuff
without it being a lilypond bug.

Cheers,
- Graham