Thanks, I will try this out ASAP!

Rutger

On 09/02/2016 11:52 AM, Thomas Morley wrote:
2016-09-02 11:44 GMT+02:00 Rutger Hofman <rut...@cs.vu.nl>:
I guess I have been too zealous in minimizing my example that still produces
a core dump. My original example is to have a bracketed keysig and later a
bracketed key change to c \major (i.e. key cancellation), like so:

{
  \override Staff.KeySignature.stencil = #(lambda (grob) (bracketify-stencil
(ly:key-signature-interface::print grob) Y 0.1 0.2 0.1))
  \key ges \major
  ces4
  \key c \major
  c
}

In Harm's fix, there is no bracket around the \key c \major.

Indeed, why bracketify something not visible.
Though, you may want to have brackets around KeyCancellation:

%% here add my fix, then

{
  \override Staff.KeyCancellation.stencil =
  #(lambda (grob)
    (bracketify-stencil (ly:key-signature-interface::print grob) Y 0.1 0.2 0.1))
  \override Staff.KeySignature.stencil =
  #(lambda (grob)
    (bracketify-stencil (ly:key-signature-interface::print grob) Y 0.1 0.2 0.1))
  \key ges \major
  ces4
  \key c \major
  c
}


Cheers,
  Harm



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