Using change staff in tight spaces leads to wrongly positioned notes with duplet in crossing notes

[Phil Holmes]

I first saw this in a score I was producing for real (thanks to Harm for 
pointing it out) and have managed to pare it down to a usable, though not 
small, example.  In the example I've been forced to prevent line breaks in 
order to replicate what is actually happening.  Should I just go ahead and 
raised a bug report?


\version "2.17.9"
\pointAndClickOff
#(set-global-staff-size 18)

\new Score \with { \override NonMusicalPaperColumn #'line-break-permission = 
##f }
 {
 <<
   \new Staff {   \clef "treble"
     \key e\major
     \time 9/8
     \autoBeamOff
     b'8  b' b'  b'  b'  b'  b'  b' b' |  % 1
     b'4. b'4. b'4.  |  % 2
     b'1 b'8 |
   }
   \new PianoStaff <<
     \new Staff = "RH"  \with {
       \override VerticalAxisGroup #'staff-staff-spacing = #'((padding . 
5))
     }
     {
       \autoBeamOff
       \clef "treble"
       \key e\major
       \time 9/8
       \times 3/2 {  \voiceOne  \change Staff = LHLayer  fis,32 (  [  cis32 
fis32 \voiceTwo  \change Staff = RH  a32 cis'32 fis'32 gis'32 a'32 )  ]  } 
\times 3/2 {  \voiceOne  \change Staff = LHLayer  fis,32 (  [  cis32 fis32 
\voiceTwo  \change Staff = RH  a32 cis'32 fis'32 gis'32 a'32 )  ]  }  \times 
3/2 {  \voiceOne  \change Staff = LHLayer  fis,32 (  [  cis32 fis32 
\voiceTwo  \change Staff = RH  a32 cis'32 fis'32 gis'32 a'32 )  ]  }   |  % 
15
       \times 3/2 {  \voiceOne  \change Staff = LHLayer  e,32 (  [  a,32 
cis32 \voiceTwo  \change Staff = RH  a32 cis'32 fis'32 gis'32 a'32 )  ]  } 
\times 3/2 {  \voiceOne  \change Staff = LHLayer  e,32 (  [  a,32 cis32 
\voiceTwo  \change Staff = RH  a32 cis'32 fis'32 gis'32 a'32 )  ]  }  \times 
3/2 {  \voiceOne  \change Staff = LHLayer  e,32 (  [  a,32 cis32 \voiceTwo 
\change Staff = RH  a32 cis'32 fis'32 gis'32 a'32 )  ]  }   |  % 16
       b'1 b'8 |
     }
     \new Staff = "LHLayer"
     {
       \autoBeamOff
       \clef "bass"
       \key e\major
       \time 9/8
       s2.  s4. |  % 1
       s2.  s4. |  % 2
       b,4 b, b, b, b'8 | % High b at end spaces staves wider - can be 
hidden if needed.
     }
   >>  % Pianostaff end
 >> % Music end
}


--
Phil Holmes

BeautyRealExample.png
Description: PNG image

BeautyBug.png
Description: PNG image