Merge_rests_engraver and dotted rest problem

[Risto Vääräniemi]

Hi,

I just discovered the new Merge_rests_engraver that should merge the
rests of two voices. It is an improvement to the LSR snippet 336 *)
because it now combines the whole-measure rests. However, it fails to
merge dotted rests.

There was a short discussion from November 2016 about a similar issue
but I'm not sure if it's the same:
http://lists.gnu.org/archive/html/lilypond-user/2016-11/msg00374.html

I could not find an issue about this. Is this a bug and should there
be an issue?

It'd be really nice to have one system that could handle both cases.

*) http://lsr.di.unimi.it/LSR/Item?id=336

BR,
Risto

---

\version "2.19.65"

voiceA = \relative { d''8 r4. d2 }
voiceB = \relative { fis'8 r4. g2 }
\score {
  <<
    \new Staff \with { \consists #Merge_rests_engraver }
    <<
      \new Voice { \voiceOne \voiceA }
      \new Voice { \voiceTwo \voiceB }
    >>
  >>
}

Merge_rests_engraver-dotted_rests.png
Description: PNG image