Re: Stave drawing behavior after a key change without following notes changed in 2.19.16

[Jean Abou Samra]

Le 05/10/2022 à 21:30, Tobias Leupold a écrit :
> Hi all!
>
> After quite some time, I re-rendered some of my Lilypond sheets and tried to
> update them from some 2.18 version to Gentoo's current stable 2.22.0.
>
> I noticed that after a key change without following notes, the stave is no
> longer drawn under the following signs.
>
> I tracked this down, it happened with version 2.19.16.
>
> Here's a minimalistic example to reproduce it:
>
>      \version "2.19.15"
>      
>      \score {
>          \new Staff {
>                  \key g \major c'1 \key a \major
>          }
>      }
>
> This is still rendered correctly using version 2.19.15, cf. the attached
> lilypond-2.19.15.png screenshot.
>
> With version 2.19.16, the stave is no longer extended behind the bar
> (compiling the same code, but with '\version "2.19.16"' set), cf. the
> lilypond-2.19.16.png screenshot.
>
> This still happens with version 2.22.2.
>
> So ... is this a bug, or is this a feature?! I would not have expected
> something like this to happen in a bugfix release, and I also didn't find any
> change documentation about this ...
>
> If this was intended then sorry for the spam; but how can I get the old (way
> more meaningful) behavior back? If not: How can this be worked around?
>
> Thanks for all help and/or fixes!



This change was intended.

commit 05ecaef595f5aff1de3f46edde90a0644a81e957
Author: David Kastrup <dak@gnu.org>
Date:   Sat Oct 4 01:12:55 2014 +0200

    Issue 660: ossia staff doesn't stop at correct horizontal position

This was done to fix
https://gitlab.com/lilypond/lilypond/-/issues/660

If you look at the pictures on the issue, you can see that
what seems more logical to you at the end of the piece
becomes less logical if the staff stops mid-piece, for
example if it is an ossia staff, or if you are just
changing the type of staff, as in


\version "2.22.2"

\new OneStaff {
  <<
    \new Staff { c'1 }
  >>
  \new RhythmicStaff { c'1 }
}


Nevertheless, it is possible to get the old behavior using


\version "2.22.2"

\layout {
  \context {
    \Score
    \override StaffSymbol.break-align-symbols = #'(break-alignment)
  }
}

\score {
  \new Staff {
          \key g \major c'1 \key a \major
  }
}



Finally, 2.19.16 was not a bugfix release. LilyPond uses a versioning
scheme where x.y.z versions with y even are stable versions, and with
y odd are unstable versions. So this was just a development release in
the release cycle between the stable releases 2.18 and 2.20.

Best,
Jean