Comment #8 on issue 1110 by d...@gnu.org: Wrong octave of repetition chord
with \relative and #{ #} syntax
http://code.google.com/p/lilypond/issues/detail?id=1110
This is not a problem of #{ ... #}. It is actually a problem of $music.
You'll get the same result if you say
zap = { <c e g>4 ~ q }
\relative c' \zap
The reason is that when music passes through a MUSIC_IDENTIFIER (and $
works by creating such an identifier), Lilypond does a deep copy of the
structure.
The repeated chord relative callback in lily/music-sequence.cc, however,
works by looking up the pitch of the 'original-chord that it already
assumes to be relativated. Unfortunately, after a deep copy,
the 'original-chord is no longer the same as the original chord, since the
deep copying made _separate_ copies of the original chord, and the
original-chord field of the RepeatedChord.
As a consequence, after copying the original-chord field does not point to
a relativated chord, but to a copy that has been made _before_ relativizing
and that is no longer associated with the relativized chord.
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