with the code (admittedly wrong)
{ \set Fingering = #'(up) g1 -1 }
LilyPond stops working; without the fingering (-1) there is neither warning
nor crash
similar crash with
{ \set Stem = #'(up) g1 }
but using a stemless "note" works:
{ \set Stem = #'(up) s1 }
would it be possible to create a warning/error message in such cases?
Eluze
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