Strictly speaking this oversight in issue 4356 did not actually
manifest itself as a bug because of another bug masking it.
(music 'ContextSpeccedMusic
context-id "null"
context-type 'NullVoice)
(music 'ContextSpeccedMusic
context-id "null"
context-type 'NullVoice)
+ ?pc-music
+ ?pc-marks))))
(with-music-match
(?pc-music (music 'PartCombineMusic))
(format #f "~a" (music->lily-string ?pc-music)))))
(with-music-match
(?pc-music (music 'PartCombineMusic))
(format #f "~a" (music->lily-string ?pc-music)))))