Re: strange formatting with involved `\break`

[Jean Abou Samra]

Le 16/10/2020 à 16:34, Jean Abou Samra a écrit :
> > Folks,
> >
> >
> > can someone please explain to me why the following code
> >
> >    {
> >      \compressEmptyMeasures
> >      c'4 4 4 4 | 4 4 4 4 | 4 4 4 4 | 4 4 4 4 | \break
> >      R4*120 | \break
> >      c'4 4 4 4 | 4 4 4 4 | 4 4 4 4 | 4 4 4 4 |
> >      c'4 4 4 4 | 4 4 4 4 | 4 4 4 4 | 4 4 4 4 |
> >      c'4 4 4 4 | 4 4 4 4 | 4 4 4 4 | 4 4 4 4 |
> >      c'4 4 4 4 | 4 4 4 4 | 4 4 4 4 | 4 4 4 4 |
> >    }
> >
> > causes such an uneven formatting after the multi-measure?  And is
> > there a work-around available?
> >
> >
> >      Werner
>
> Hi,
> (Excuse the bad email threading, which will get fixed next time I reply.)
>
> Interesting. The example can be made even more minimal, without
> \compressEmptyMeasures:
>
> {
>   c'1
>   \break
>   \repeat unfold 35 { c'1 }
> }
>
> This produces the same bad output in 2.20. In 2.18, the output
> is still suboptimal, but different (files attached).
>
> A workaround would be
>
> \paper {
>   page-breaking = #ly:minimal-breaking
> }
>
> Both ly:optimal-page-breaking and ly:page-turn-breaking are faulty;
> ly:one-page-breaking is not.
>
> This issue could be related:
>
> https://gitlab.com/lilypond/lilypond/-/issues/5488
>
> Regards,
> Jean

Hi Werner,

Added to the tracker as https://gitlab.com/lilypond/lilypond/-/issues/6057.

For the future, maybe this kind of quirks can be reported there directly 
(which would save them from the risk of getting lost under the volume of 
email).

Cheers,
Jean