(define function-value-list
       '((duration      . ( ,ly:duration-log )) 
         (step           . (,ly:pitch-notename ))
         (octave         . (,ly:pitch-octave ))
         (test           . (,display ))))


At the beginning of line 2, replace the apostrophe ' by `
(a semiquote in scheme)
http://www.gnu.org/software/guile/manual/guile.html#Expression-Syntax

(define function-value-list
         `((duration      . ( ,ly:duration-log ))       etc ...


Gilles


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