Re: cadenza followed by a MMR is buggy

[Dan Eble]

On Jan 14, 2021, at 19:13, Dan Eble <dan@faithful.be> wrote:
> 
> On Jan 14, 2021, at 18:33, Dan Eble <dan@faithful.be> wrote:
>> 
>> Alas, all is not well with earlier versions.  Consider the confusing bar 
>> numbers in the following elaboration of your example.  How would you resolve 
>> it?
> 
> My thoughts:
> 
> Measure 1 is complete, so the first "2" is not incorrect, though it might not 
> be what a user expects.
> 
> No measure can start twice.
> 
> The second "2" should either be "(2)", or it should be "3" and the "3" should 
> be "4".

Add issue #3640 to this discussion.  Accidentals, bar numbers, and (now) 
multi-measure rests are all impacted by the fact that \bar "|" does not create 
a new measure.

\new Score \with {
  barNumberVisibility = #(every-nth-bar-number-visible 1)
  \override BarNumber.break-visibility = #all-visible
} {
  f'1
  \cadenzaOn
  bes2
  \cadenzaOff
  %\partial 1024 s1024 %<<< try this
  \bar "|"
  << R1 bes1 >>
}

I don't think that merely restoring the previous behavior of 
Multi_measure_rest_engraver would be the right thing to do, because acting as 
if a measure begins at \bar "|" is inconsistent with other engravers.
— 
Dan