[Lilypond-auto] Issue 4012 in lilypond: Strange collision avoidance with multiple voices

[lilypond]

Status: Accepted
Owner: ----
Labels: Type-Ugly

New issue 4012 by address@hidden: Strange collision avoidance with multiple  
voices
http://code.google.com/p/lilypond/issues/detail?id=4012

In the following code, the r8 is moved to a strange position.

\new Staff
<< \new Voice { d16 fis'16 b a <a fis>8 r8 r2 }
   \new Voice { \stemDown d,2 } >>

It turns out that replacing r8 with \tweak Stem.direction #UP r8 or  
equivalently \single \stemUp r8 is sufficient for stopping the problem.

Somewhat absurdly, even \tweak Stem.direction #CENTER r8 is enough to stop  
the problem.

It is rather startling that Stem.direction has an influence on the  
positioning of rests.  It is also quite unclear what kind of collision this  
positioning is supposed to avoid.

Attachments:
        goas.preview.png  6.0 KB

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