Re: Error in Extending Lilypond example

[Jean Abou Samra]

Le 1 févr. 2023 à 11:23, Thomas Morley <thomasmorley65@gmail.com> a écrit :

Am Mi., 1. Feb. 2023 um 04:16 Uhr schrieb Saul Tobin
<saul.james.tobin@gmail.com>:

The fourth example engraver here:

https://extending-lilypond.readthedocs.io/en/latest/extending/translation.html#fourth-engraver-example

Running this code in 2.24 crashes on initializing the engraver with In

procedure ly:spanner-set-bound!: Wrong type argument in position 3

(expecting Item): ().

Fwiw, looks like (ly:context-property ctx 'currentCommandColumn) is
not longer available in the initialize-step of an engraver.
Not the time to bisect when and why this happened,

It’s this: https://gitlab.com/lilypond/lilypond/-/commit/7a09ffee2c69ab9617289afd21dae1b9198a9fee

Perfectly intentional.

Also, reading it in initialize was a bad idea in 2.22 in the first place. That creates a dependency on the order in which engravers are \consists-ed between your engraver and Paper_column_engraver. I’ll fix it by doing it in the first run of process-music. It should have been like that in the first place.