FWIW,
I looked through our regtests searching for { r4. } in simultaneous music and
found only:
dot-column-rest-collision.ly
dots.ly
merge-rests-engraver.ly
rest-dot-position.ly
merge-rests-engraver.ly is the single one with _three_ voices
I then modified rest-dot-position.ly :
~~~
mus = {
r\longa. r\breve.
r1. r2. r4.
\once \override Rest.style = #'classical r4.
r8. r16. r32. r64. r64.
}
vI = \new Voice { \override Rest.color = #red \voiceOne \mus }
vII = \new Voice { \override Rest.color = #green \voiceTwo \mus }
vIII = \new Voice { \override Rest.color = #cyan \voiceThree \mus }
vIV = \new Voice { \override Rest.color = #yellow \voiceFour \mus }
{
\set Score.timing = ##f
\set Staff.instrumentName = #(lilypond-version)
\mus
\bar "" \break
<< \vI \vII >>
\bar "" \break
<< \vI \vII \vIII >>
\bar "" \break
<< \vI \vII \vIII \vIV >>
}
~~~
If you look at the output you see dots moving depending on \voiceXxxx
To make it more obvious colors are applied.
So far I the results are not random, though I always checked in-file and not
running the regtests.
Maybe of some help, though.
Btw, some output is really poor, imho, see the dots for short rests in the
outer voices.
---
** [issues:#5217] random results for the merge-rests-engraver regression test**
**Status:** New
**Created:** Fri Oct 20, 2017 07:28 AM UTC by Knut Petersen
**Last Updated:** Sat Oct 21, 2017 10:58 AM UTC
**Owner:** Knut Petersen
**Attachments:**
-
[out-test-baseline-merge-rests-engraver.png](https://sourceforge.net/p/testlilyissues/issues/5217/attachment/out-test-baseline-merge-rests-engraver.png)
(23.8 kB; image/png)
-
[out-test-merge-rests-engraver.png](https://sourceforge.net/p/testlilyissues/issues/5217/attachment/out-test-merge-rests-engraver.png)
(23.7 kB; image/png)
There is some randomness in the placement of dots. The merge-rests-engraver.ly
regtest (git-version557dc7) exposes the problem as the output might be one of
the two attached pngs. The probability for both results is identical on my
system.
---
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