Hi David,
Am 05.02.2017 um 16:19 schrieb David Kastrup:
David Kastrup <d...@gnu.org> writes:
Jan-Peter Voigt <jp.vo...@gmx.de> writes:
Hi folks,
I just stumbled over a bug with \displayLilyMusic and
scheme-engravers. The following fails in recent devel:
%%%
\version "2.19.55"
\displayLilyMusic \new Staff \with {
\consists #(lambda (context)
(make-engraver))
} \relative { bes'4 a c b }
%%%
ERROR: In procedure symbol->string:
ERROR: Wrong type argument in position 1 (expecting symbol):
#<procedure #f (context)>
%%%
Until 2.19.53 or 54 this didn't crash, but the output was not a
serialization of the context-mod (\with), so I assume, someone is
working on it :-)
I will have a look into the internals after lunch.
I think you are understating the problem. \displayLilyMusic has nothing
to do with it.
yes, I do :-)
This is a "how did this ever pass testing" kind of case [checking the
regtests].
The regtests don't use \with at all but only layout redefinitions.
This is a showstopper in case anybody was thinking of rolling a
developer release right now.
Ok, no it isn't a showstopper. The problem here is that (make-engraver)
returns an empty list, and an empty list is not accepted right now as an
engraver. The moment you actually have anything that deserves the name
"engraver", it works.
Arguably, this wants fixing but it is sort of a "meh" example.
Thank you very much!
So I have empty engravers creeping around ... that is easy to fix!
Best
Jan-Peter
_______________________________________________
lilypond-devel mailing list
lilypond-devel@gnu.org
https://lists.gnu.org/mailman/listinfo/lilypond-devel
