Re: Possible bug in 2.12.[23]

[Phil Holmes]

This would appear to be a feature of the "implicit" voice creation, as 
described in the Notation Reference 1.5.2.  If you explicitly name the 
voices:

alt = \relative c'' { a2 << { \voiceTwo \stemDown \hs \ignore e2 } \new 
Voice { \voiceTwo a4( gis) } >> }

I think you'll find you get what you want.

For future reference, queries where it's not clear it's a bug are usually 
best sent to the lilypond-user group initially.

--
Phil Holmes
Bug Squad


"Herman Grootaers" <address@hidden> wrote in message 
news:address@hidden
> > I'm not top posting.
>
> Greetings all,
>
> I have recently restarted a project of myself, because I do have some free
> time to spare.
>
> So I started to upgrade a number of scores I had already done and I 
> discovered
> the following excerpt which does behave weird. It is in the alto-part of a
> four-voice a-capella choir-piece which in one bar is split. The lyrics 
> however
> are not handled correctly, due to the fact that the alto-part is 
> completely
> gone, but will be taken on in the next bar.
>
> If I reduce  the excerpt to the offending part of the bar I get an error
> indicating that the alto-part is missing, although is printed. strange
>
> This behaviour is also in version 2.12.2, earlier versions I cannot 
> remember
> if this was already in place.
>
> Yours,
> Herman Grootaers
> Ps: I am subscribed to the bu-list, i.e. I do receive the mails from the 
> bug-
> list.
>
>
>
> > > Lilypond-listing <<
> \version "2.12.3"
> global = { \key g \major
>           \time 4/4
>         }
> ignore = \override NoteColumn #'ignore-collision = ##t
> hs = \once \override NoteColumn #'force-hshift = #1.7
> sop = \relative c'' { c2 \hs b }
> alt = \relative c'' { a2 << { \stemDown \hs \ignore e2 } \\ { a4( gis) } 
>  >> }
> ten = \relative c'  { e2 d }
> bas = \relative c   { e2 <<e, e'>> }
> koor = \lyricmode { bla bla }
> \score
> { \context ChoirStaff
>   << \context Staff = "women"
>     << \clef treble
>        \set Staff.instrumentName = \markup { \center-column { Soprano 
> Alto } }
>        \context Voice = "soprano" { \voiceOne << \global \sop >> }
>        \context Voice = "alto" { \voiceTwo << \global \alt >> }
>        \context Lyrics = alto { s1 }
>     >>
>     \context Staff = "men"
>     << \clef bass
>        \set Staff.instrumentName = \markup { \center-column { Tenor 
> Bas } }
>        \context Voice = "tenor" { \voiceOne << \global \ten >> }
>        \context Voice = "bass" { \voiceTwo << \global \bas >> }
>     >>
>     \context Lyrics = alto \lyricsto alto \koor
>   >>
>   \layout { \context { \Staff } }
> }