Matt Wallis <[email protected]> writes:
> Here is a small example:
>
> \include "english.ly"
>
> global = {
> \time 4/4
> \tempo 4 = 96
> }
> \score {
> \new Staff {
> \clef treble
> \global
> \relative c' { c1 }
> }
> \midi { \global }
> }
>
> ... that provokes this error in 2.19.80:
> In procedure ly:add-context-mod in expression (ly:add-context-mod
> mods (list # #)):
> /opt/local/share/lilypond/2.19.80/scm/lily-library.scm:375:14: Wrong
> type argument in position 1 (expecting Context_mod): #f
>
> ... but works fine in 2.18.2
You know: the minimal example would have been
\midi { \time 4/4 }
and that would have saved adding a lot of other explanation:
> The error is triggered by the use of \global in the midi block when
> global contains "\time 4/4". Incidentally, if the midi block contains
> a \key signature, but no \time, then it works fine in 2.19.80.
>
> I can understand that \time is irrelevant to midi (as is \key?), but
> I've used this lazily in the past because it works.
It is intended to work. I am surprised that this has been overlooked
for so long.
> I'd be interested to know if you think the correct fix is to restore
> the original 2.18.2 behaviour, or to output an error message that
> identifies the line that causes the problem.
I'm currently writing two fixes. One makes a better warning, the other
does not trigger it.
--
David Kastrup
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