Updates:
Status: Invalid
Comment #1 on issue 1764 by n.putt...@gmail.com: \displayLilyMusic causes
error with \addFingering from LSR 768
http://code.google.com/p/lilypond/issues/detail?id=1764
The LSR snippet is really at fault here; it shouldn't set 'tweaks to #f.
Note that there are many ways to cause \displayLilyMusic to crash if you
fiddle with music properties; things like 'articulations and 'tweaks are
expected to be (possibly empty) lists.
\displayMusic \addFingering a #"-5"
(make-music
'EventChord
'elements
(list (make-music
'NoteEvent
'articulations
(list (make-music
'FingeringEvent
'digit
5
'direction
-1
'tweaks ;; this is bad
#f))
'elements
'()
'duration
(ly:make-duration 0 0 1 1)
'pitch
(ly:make-pitch -1 5 0))))
If there are no tweaks to set, it shouldn't set the property (or if that's
too difficult, set it to the empty list).
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