Disappearing clef again!

[Erik Sandberg]

Hi,

I reported this problem in September, and saw today that it still exists.

I am using lily 1.6.6 and guile 1.6.0.

In the following score, the treble clef on the 3rd system of the score
disappears. It is exactly the same error as it was with lily 1.6.0 and guile 
1.4. The clef comes back e.g. if I remove the Staff.instr assignments or 
change the papersize.

If I add more notes to the score, all subsequent systems have their treble 
clefs removed as well, and the same if I add any staves before the last one.

Erik

\version "1.6.6"
\include "paper13.ly"

MandolinStaff = \notes {
  \clef "treble"
  \key d\major
  \time 6/8
  d''16  e''16  fis''16  g''16  a''16  fis''16  d''8  fis''8 a''8  |
  % 2
  g''16  a''16  b''16  cis'''16  d'''16  b''16  g''8  b''8  
  d'''8  |
  % 3
  a'16  b'16  cis''16  d''16  e''16  fis''16  g''16  fis''16  
  g''16  e''16  cis''16  e''16  |
  % 4
  d''16  fis''16  d''16  a'16  fis'16  a'16  d'4  r8  |
  % 5
  d''16  e''16  fis''16  g''16  a''16  fis''16  d''8  fis''8  
  a''8  |
  % 6
  g''16  a''16  b''16  cis'''16  d'''16  b''16  g''8  b''8  
  d'''8  |
  % 7
  a'16  b'16  cis''16  d''16  e''16  cis''16  a'8  cis''8  
  e''8  |
  % 8
  e'16  fis'16  g'16  a'16  b'16  cis''16  d''16  cis''16  
  d''16  a'16  fis'16  d'16  |
  % 9
  d''16  e''16  fis''16  g''16  a''16  fis''16  d''8  fis''8  
  a'8  |
  % 10
  gis'16  b'16  e''16  b'16  gis'16  b'16  a'16  cis''16  
  e''16  cis''16  a'16  cis''16  |
  % 11
  fis'16  a'16  d''16  a'16  fis''16  d''16  cis''16  e''16  
  a''16  cis''16  b'16  gis''16  |
  % 12
  a'16  cis''16  e''16  a''16  e''16  cis''16  a'16  cis''16  
  e''16  cis''16  a'16  cis''16  |
  % 13
  a'16  d''16  fis''16  d''16  a'16  d''16  gis'16  b'16  
  e''16  b'16  gis'16  b'16  |
  % 14
  a'16  e''16  cis''16  a'16  e'16  cis'16  <a4 e'4  a'4> r8      |
}

DonGiovanniStaff = \notes {
  \clef "bass"
  \key d\major
  \time 6/8
  R2. | R2. | R2. | 
  % 4
  r4 r8 r4 a8  |
  % 5
  [a8(  )d'8]  d'8  d'4  cis'8  |
  % 6
  b4  b8 r8 r8  b8  |
  % 7
  a4. ~ [a8( )b8]  g8  |
  % 8
  a4(  )g8  fis8  r8  a8  |
  % 9
  [a8(  )d'8]  d'8  d'4  cis'8  |
  % 10
  b4.  cis'4.  |
  % 11
  a4  d'8  [cis'8.(  d'16  )b8]  |
  % 12
  a4  r8 r4 r8 | R2. |
  % 14
  r4 r8 r4 a8  |
}


\score {
  <
    \context Staff = Mandolin <
      \property Staff.instr = "Mand."
      \MandolinStaff
    >

    \context Staff = DonGiovanni <
      \property Staff.instr = "D.Giov."
      \DonGiovanniStaff
    >
  >
  \paper {\translator {\StaffContext minimumVerticalExtent = #'(-4 . 4) }}
}