Re: Ambitus + Cue gives spurious note column warning

[Jean Abou Samra]

Le 23/07/2022 à 15:58, Richard Shann a écrit :
> The combination of Ambitus and a cue seems to provoke a strange
> warning:
>
> 8><8><8><8><8><8><8><8><8><8><8><8><8><8><8><8><8><8><8><8><8><
> \version "2.22"
> MvmntIVoiceI = { c'1 c'}
> MvmntIVoiceII = {
>                   \cueDuringWithClef #"1 Treble on Staff 1 Mvmnt 1"#1 #"treble" 
> { R1*4/4 }
>                   c1
>                  }
>
> \layout { \context {  \Voice   \consists "Ambitus_engraver" }}
>
> \addQuote "1 Treble on Staff 1 Mvmnt 1" \MvmntIVoiceI
>
> \score {
>            <<
>              \new Staff  <<
>    
>                            \new Voice  { \MvmntIVoiceI } %End of voice
>                          >> %End of Staff
>
>              \new Staff   <<
>                              \new Voice = "MvmntIVoiceII"  { \clef alto 
> \MvmntIVoiceII }
>                          >>
>            >>
>         }
> 8><8><8><8><8><8><8><8><8><8><8><8><8><8><8><8><8><8><8><8><8><
>
> which gives:
>
> Starting lilypond 2.22.0 [Ambitus-cue-notecolumnclash.ly]...
> Processing `/home/rshann/Skype/Ambitus-cue-notecolumnclash.ly'
> Parsing...
> Interpreting music...
> Interpreting music...
> Preprocessing graphical objects...
> programming error: Note_column without heads and stem
> continuing, cross fingers
> /home/rshann/Skype/Ambitus-cue-notecolumnclash.ly:6:18: programming
> error: note-column has no direction
>                   
>                   c1
> /home/rshann/Skype/Ambitus-cue-notecolumnclash.ly:6:18: continuing,
> cross fingers
>
> I cut this down from a much bigger score to make a MWE but in so doing
> I see I have inadvertently triggered an extra warning, the first one
> above about Note_column without heads and stem. The original only has
> the warning about "note-column has no direction". I hope this won't
> muddy the issue.
>
> Any thoughts?



That sounds like https://gitlab.com/lilypond/lilypond/-/issues/1113.

The fix appears to be very simple, currently writing the regression
tests to post a patch ...

You can work around it for now using

\layout {
  \context {
    \Score
    \override AmbitusNoteHead.meta.interfaces =
      #'(ambitus-interface
         font-interface
         ledgered-interface
         note-head-interface
         staff-symbol-referencer-interface)
  }
}

Best,
Jean