Possible bug with system-count

[Cameron Horsburgh]

Hi Joe,

You may already be aware of this issue, but I'll report it anyway.

I'm currently typesetting a piece that should comfortably fit two
systems to a page. For consistency's sake I've added system-count = 2 in
the \layout block. I've added a minimalish file atthe bottom of this
message. When I compile it I get the following output:

,----
| lilypond /home/cameron/temp/systemcount.ly
| GNU LilyPond 2.13.2
| Processing `/home/cameron/temp/systemcount.ly'
| Parsing...
| Interpreting music... [8][16][24][32][40][48][56][64][72][80][88][96]
| Preprocessing graphical objects...
| Calculating line breaks... 
| warning: cannot find line breaking that satisfies constraints
| Drawing systems... 
| Solving 1 page-breaking chunks...[1: 1 or 2 pages]
| Drawing systems...
| Layout output to `systemcount.ps'...
| Converting to `./systemcount.pdf'...
| 
| Compilation finished at Tue Jul 21 09:53:19
`----

With system-count = 2  I notice several things:

1) I never get more than three systems. The third system will simply run
off the page. Experimentation with other values for system-count
suggests the total number of systems in the piece will be the specified
system-count plus one and the final system will not line break.

2) If there is a lot of room on the page the third system will appear on
the first page anyway. Try commenting the << and >> out to see what I
mean.

3) If I unset system-count, everything works normally.

Here's a somewhat minimal example of a file that displays this:

------------------8<---------------------
\version "2.13.2"

notes = \relative c''{
  \repeat unfold 100 {a b c d}
}

\score{
  \new GrandStaff{
    <<
      \new Staff{
        \notes
      }
      \new Staff{
        \notes
      }
      \new Staff{
        \notes
      }
      \new Staff{
        \notes
      }
      \new Staff{
        \notes
      }
    >>
  }
  \layout{
    system-count = 2
  }
}

------------------8<---------------------

Hope this helps,

-- 

Cameron Horsburgh

Blog: http://spiritcry.wordpress.com/