Using 2.4.6, if a \midi block is added to a .ly file containing a line
#(add-grace-property ..., lilypond fails with the errors:
GNU LilyPond 2.4.6
Processing `/cygdrive/D/LilyWork/Tests/add-grace-prop.ly'
Parsing...
Interpreting music... Backtrace:
In unknown file:
?: 0* [lilypond-main ("/cygdrive/D/LilyWork/Tests/add-grace-prop.ly")]
In /usr/share/lilypond/2.4.6/scm/lily.scm:
337: 1* (let* ((failed #) (handler #)) (for-each (lambda # #) files) ...)
339: 2* [for-each #<procedure #f #> #]
In /usr/share/guile/1.6/srfi/srfi-1.scm:
663: 3 (if (null? rest) (letrec ((lp #)) (lp list1)) ...)
...
667: 4 (begin (f (car l)) (lp (cdr l)))
668: 5* [#<procedure #f (f)>
"/cygdrive/D/LilyWork/Tests/add-grace-prop.ly"]
In /usr/share/lilypond/2.4.6/scm/lily.scm:
341: 6 [catch ly-file-failed #<procedure #f ()> #<procedure #f (key
arg)>]
In unknown file:
?: 7* [#<procedure #f ()>]
In /usr/share/lilypond/2.4.6/scm/lily.scm:
341: 8* [ly:parse-file "/cygdrive/D/LilyWork/Tests/add-grace-prop.ly"]
In /usr/share/lilypond/2.4.6/ly/init.ly:
7: 9* (if (pair? toplevel-scores) (ly:parser-print-book parser #))
8: 10 [ly:parser-print-book #<my_lily_parser > #<Book>]
In unknown file:
?: 11* [set-prop #<Context Voice=1 () >]
In /usr/share/lilypond/2.4.6/scm/music-functions.scm:
548: 12* (let* (# # #) (ly:context-set-property! where # new-settings))
549: 13* [ly:context-property () graceSettings]
/usr/share/lilypond/2.4.6/scm/music-functions.scm:549:21: In procedure
ly_context_property in expression (ly:context-property where (quote
graceSettings)):
/usr/share/lilypond/2.4.6/scm/music-functions.scm:549:21: Wrong type
argument in position 1 (expecting Translator group): ()
\version "2.4.6"
\include "english.ly"
\score {
<<
% you get the error if one (or both) of theese two lines is active
AND the midi block is active
#(add-grace-property 'Voice 'Slur 'direction 1)
#(add-grace-property 'Voice 'Stem 'direction -1)
\relative c'' {a b c d e}
\\
\relative c'{a b c d e}
>>
\midi {
}
\layout {
}
}
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