Thank you for all your work on LilyPond!
I’ve found that when defining a stream of music using \addQuote, if the music
contains a custom context, “cannot create context” warnings are thrown when the
music is passed to \addQuote.
I suspect that these warnings are accurate—the custom context really can’t be
created—but I’m reporting it as a bug because, as far as I can tell, there’s no
way to cause \addQuote to create the custom context. (The warnings can be
silenced with ly:expect-warning, however.)
I can reproduce this in LilyPond 2.24.4 and 2.25.27. Note that in 2.24.4, the
behavior is a little different; LilyPond 2.24.4 reports that converting to a
PDF failed with “fatal error: failed files: [filename]”, but the PDF is
actually written. LilyPond 2.25.27 reports “Success: compilation successfully
completed”.
Here is a minimal example:
\version "2.25.24"
\layout {
\context {
\name MyContext
\type Engraver_group
\alias Voice
}
\inherit-acceptability MyContext Voice
}
music = \new MyContext { s1 }
\score {
\new Staff { \music }
}
% #(ly:expect-warning (G_ "cannot create context: ~a") "MyContext")
\addQuote "music" \music
