Re: segfault when making grob in scheme engraver

[Jan-Peter Voigt]

Hi Rekado,

I think, this is expectable. The stop-translation-step is too late ... 
you should create grobs in process-music.
If you want this to happen as a last action, you should look at the 
order of all engravers. The last instanciated engraver should be 
processed last, IIRC

HTH, Jan-Peter



On 01.03.2013 05:10, rekado rekado wrote:
> \version "2.16.1"
>
> #(define segfault-engraver
>    (list
>     (cons 'stop-translation-timestep
>      (lambda (trans)
>       ;; creating the grob causes the segfault
>       (let ((x (ly:engraver-make-grob trans 'TextScript '())))
>        (ly:grob-set-property! x 'text "hi"))))))
>
> \layout {
>    \context {
>      \Score
>      \accepts "SegTab"
>    }
>    \context {
>      \Staff
>      \name "SegTab"
>      \accepts "SegVoice"
>    }
>    \context {
>      \Voice
>      \name "SegVoice"
>      \consists \segfault-engraver
>    }
> }
>
> \header {
>    title = "Segfault"
> }
>
> \score {
>    \new GrandStaff
>    <<
>      \time 4/4
>      \new SegTab {
>        \new SegVoice = melody {
>          \relative f {
>            c'8-1\4 d-2 e4-3 f\3 g8-4
>          }
>        }
>      }
>
>      \new SegTab {
>        \new SegVoice = bass {
>          \relative f {
>            c,8-1\8 d e f4 g
>          }
>        }
>      }
>    >>
> }