Issue 2151 in lilypond: add-grace-note usage interferes with MIDI output in same score block

[lilypond]

Status: Accepted
Owner: ----

New issue 2151 by address@hidden: add-grace-note usage interferes  
with MIDI output in same score block
http://code.google.com/p/lilypond/issues/detail?id=2151

add/remove-grace-property does not cooperate with midi in the same score  
block. Compile produces:

Wrong type argument in position 1 (expecting Context)

This error is not present when MIDI output block is removed.

Workaround is to place MIDI output in separate score block. Also reproduced  
in 2.14.2

\version "2.15.18" % In earlier versions, replace $ by #
\score {
 \new Staff {
   $(add-grace-property 'Voice 'Fingering 'font-size -6)
   \new Voice { b2 \grace b-2 c'-3 }
 }
 \layout{}
 \midi{} %% Wrong type argument in position 1 (expecting Context)
}