Re: BUG? VerticalAxisGroup #'next-staff-spacing and \RemoveEmptyStaffContext

[Joe Neeman]

On Sat, 2010-06-05 at 16:54 +0200, Xavier Scheuer wrote:
> Hi Joe!
> 
> We have had a discussion on the LilyPond French Users mailing lists
> about the new vertical spacing system.[1]
> Thanks again for this powerful system.
> 
> Jean-François was using
>   \override VerticalAxisGroup #'next-staff-spacing
> in the last Staff of a "group" to define a bigger space between, for
> example, two groups (woodwinds and brass instruments).
> But this bigger space disappears (in the same time as the Staff) when
> this Staff is empty and we use \RemoveEmptyStaffContext .
> 
> I advised him to use
>   \override StaffGrouper #'after-last-staff-spacing
> instead, thinking that would solve the problem, since I thought
> StaffGrouper would check _at each moment_ which Staff is *effectively* the
> last one.
> 
> But apparently I was wrong, it seems that StaffGrouper determines which
> Staff is the last of the "group" _at the beginning_ and then assume
> this Staff will always stay the last one of the group

This is indeed a bug; I'll take a look.

Cheers,
Joe