[Lilypond-auto] Issue 3073 in lilypond: Context definitions and context mods ignore \unset

[lilypond]

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

New issue 3073 by address@hidden: Context definitions and context mods ignore  
\unset
http://code.google.com/p/lilypond/issues/detail?id=3073

With either

\score {
  \new DrumStaff { c c c c }

  \layout { \context { \DrumStaff \unset clefGlyph } }
}

\score {
  \new DrumStaff \with { \unset clefGlyph } { c c c c }
  \layout { }
}

the clefGlyph does not get unset (which should have resulted in the  
score-level violin clef taking over).  Putting \unset clefGlyph in the  
music itself, in contrast, works.

Taking a look at the history of apply_property_operations in  
lily/context-property.cc suggests that \unset has been ignored in that  
position basically forever.