Issue 1552 in lilypond: Style 'voice accidentals incorrectly typeset when two voices immediately preceded by different single voice

[lilypond]

Status: Accepted
Owner: address@hidden
Labels: Type-Defect Priority-Low

New issue 1552 by address@hidden: Style 'voice accidentals  
incorrectly typeset when two voices immediately preceded by different  
single voice
http://code.google.com/p/lilypond/issues/detail?id=1552

In the example all b's and a's should be preceded by natural signs, as in  
the third bar:

\relative c'' {
  \key ees \major
  #(set-accidental-style 'voice)
  g1
  << { b2 a } \\ { a b } >>
  << { b2 a } \\ { a b } >>
}

If the g1 is removed both bars are typeset correctly.

Priority low as this is an unusual voice construct.  The more usual

\relative c'' {
  \key ees \major
  #(set-accidental-style 'voice)
  \new Voice {
    g1
    <<
      { b2 a b2 a  }
      \new Voice { a b a b }
    >>
  }
}

works correctly.