On Fri, 2025-08-29 at 06:45 +0000, Werner LEMBERG wrote:
> > The score below has the Bar_number_engraver moved to Staff level:
>
> > depending on the details of the music this causes an error:
>
> >
>
> > programming error: cyclic dependency:
>
> > calculation-in-progress encountered for
> > VerticalAxisGroup.adjacent-pure-heights
>
> > continuing, cross fingers
>
> >
>
> > In the real-life example that lead to this MWE the typesetting is
>
> > ok, so I'm submitting this in the hope it may prove useful for
>
> > developers. [...]
>
>
> Actually, I'm not surprised by the error message. Your input code
> can
> be reduced to the following, also shown in the attached image.
>
> ```
> \version "2.24.0"
>
> <<
> \new Staff { \stopStaff
> f'1 | f'1 }
> \new Staff { R1 | R1 }
> > >
>
>
> \layout {
> \context {
> \Score
> \remove Bar_number_engraver
> }
> \context {
> \Staff
> \consists Bar_number_engraver
> \override BarNumber.break-visibility = #all-visible
> }
> }
> ```
>
> As can be seen, there are no bar lines available in the first staff,
> which are needed for the bar number engraver to vertically position a
> bar number.
So ideally the bar number engraver could be written to not engrave a
bar number if there is no barline?
> Of course, the error message is cryptic, and my
> interpretation might just be an educated guess – but I believe that a
> error message is OK for this situation.
I'm hoping so, but although there is an ly:expect-warning there doesn't
appear to be an ly:expect-error ...
>
> What do you *really* want to achieve?
A good question - I'll open a new thread to address that on lilypond-
user, it will take a little work, but I think there may be some user
issues with ossia.
Thank you for the response
Richard Shann
