Issue 1391 in lilypond: Enhancement: warning message when an property is set in the wrong context

[lilypond]

Status: Accepted
Owner: ----
Labels: Type-Enhancement Priority-Medium Warning

New issue 1391 by v.villenave: Enhancement: warning message when an  
property is set in the wrong context
http://code.google.com/p/lilypond/issues/detail?id=1391

This feature was suggested by Werner:
http://lists.gnu.org/archive/html/lilypond-devel/2010-11/msg00229.html

It would be very helpful to many users that when typing e.g.
  {
    ...
    \override BarLine #'stencil = ##f
    ...
  }

instead of (in the appropriate context):

  \override Staff.BarLine #'stencil = ##f

A warning message would be printed, possibly along the lines of

  overriding property `stencil' for grob `BarLine' has no effect in
  context `Voice'