Re: Bracketized key signature: \key c \major causes a core dump

[Rutger Hofman]

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.

Rutger

On 09/02/2016 10:59 AM, Thomas Morley wrote:
> \version "2.19.47"
>
> %% not public, c/p from lily-library.scm
> #(define (other-axis a)
>   (remainder (+ a 1) 2))
>
> %% doesn't makes sense to bracketify an empty stencil, hence we just return it.
> #(define-public (bracketify-stencil stil axis thick protrusion padding)
>   "Add brackets around @var{stil}, producing a new stencil."
>   (if (ly:stencil-empty? stil)
>       stil
>       (let* ((ext (ly:stencil-extent stil axis))
>              (lb (ly:bracket axis ext thick protrusion))
>              (rb (ly:bracket axis ext thick (- protrusion))))
>         (set! stil
>               (ly:stencil-combine-at-edge stil (other-axis axis) 1 rb padding))
>         (set! stil
>               (ly:stencil-combine-at-edge stil (other-axis axis) -1 lb padding))
>         stil)))
>
> %%%%%%%%%%%%
> %% Example
> %%%%%%%%%%%%
>
> \relative c'' {
>   \override Staff.KeySignature.stencil = #(lambda (grob)
>     (bracketify-stencil (ly:key-signature-interface::print grob) Y 0.1 0.2 0.1))
>
>     \key c \major
>     c''
> }