LSR 631 corrupts accidental positions7 / no effect with stems

[-Eluze]

hi!

the snippet  http://lsr.dsi.unimi.it/LSR/Item?id=613 LSR 613  about avoiding
collisions between curves and objects is very nice + useful!


however, …

1) with the code below the accidental is misplaced:

\relative c' { 
  \hideCurvesFrom #'Voice.NoteHead #'(0.3 . 0.3) #'(0 . 0)
  f2 ( gis4)
}

http://old.nabble.com/file/p30814598/hideCurvesFrom.png 

2) the code:

\relative c' {
  \set tieWaitForNote = ##t
  \hideCurvesFrom #'Stem #'(0.3 . 0.3) #'(0 . 0)
  f2^~ \stemUp g4 b g f1
}

produces the error:

Drawing systems...<string>:8:430: In procedure ly:stencil-extent in
expression (ly:stencil-extent this-stil 0):
<string>:8:430: Wrong type argument in position 1 (expecting Stencil): ()

thanks
Eluze

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