error in init.ly? (lilypond 2.11.12)

[Steve D]

Hello all--

I just downloaded LilyPond 2.11.12 GUB for Linux, convert-ly'ed one of
my recent projects and ran LilyPond on the .ly file, and received this
mysterious-looking (to me) error message--

--- begin quote of error message ---

GNU LilyPond 2.11.12
Processing `blues-in-c-1.ly'
Parsing...
Interpreting music... [8][11]
Preprocessing graphical objects...
/home/xscd/lilypond/usr/bin/../share/lilypond/current/ly/init.ly:37:1:
error: GUILE signaled an error for the expression beginning here
#
 (if (or (pair? toplevel-scores) output-empty-score-list)
Wrong type argument in position 1: ()
/home/xscd/lilypond/usr/bin/../share/lilypond/current/ly/init.ly:37:5:
error: syntax error, unexpected '(', expecting '='
#(if 
     (or (pair? toplevel-scores) output-empty-score-list)
programming error: Parsed object should be dead: static
scm_unused_struct* Prob::mark_smob(scm_unused_struct*)
continuing, cross fingers
programming error: Parsed object should be dead: static
scm_unused_struct* Context_def::mark_smob(scm_unused_struct*)
continuing, cross fingers
error: failed files: "blues-in-c-1.ly"

--- end quote of error message ---

I have attached the blues-in-c-1.ly file, in case it may be relevant.

-Steve D

blues-in-c-1.ly
Description: Text document