Interpreting music... 
[/home/pnorcks/usr/share/lilypond/2.13.4/fonts/otf/emmentaler-20.otf]
elapsed time: 0.30 seconds
Element count 96 (spanners 7) 
Preprocessing graphical objects...
Grob count 164
[/home/pnorcks/usr/share/lilypond/2.13.4/fonts/otf/emmentaler-11.otf]
[/home/pnorcks/usr/share/lilypond/2.13.4/fonts/otf/emmentaler-13.otf]
[/home/pnorcks/usr/share/lilypond/2.13.4/fonts/otf/emmentaler-14.otf]
[/home/pnorcks/usr/share/lilypond/2.13.4/fonts/otf/emmentaler-16.otf]
[/home/pnorcks/usr/share/lilypond/2.13.4/fonts/otf/emmentaler-18.otf]
[/home/pnorcks/usr/share/lilypond/2.13.4/fonts/otf/emmentaler-23.otf]
[feta-alphabet20_7.029296875]
Solving 1 page-breaking chunks...
[century_schoolbook_l_serif_3.865234375][1: 1 pages]
Drawing systems...
programming error: bounds of spanner are invalid
programming error: bounds of spanner are invalid
programming error: bounds of spanner are invalid
programming error: bounds of spanner are invalid
programming error: bounds of spanner are invalid
programming error: bounds of spanner are invalid
Element count 63
programming error: didn't find a vertical alignment in this system
programming error: didn't find a vertical alignment in this system
programming error: system with empty extent
programming error: system with empty extent/home/pnorcks/usr/share/lilypond/2.13.4/scm/lily.scmBacktrace:
In unknown file:
   ?:  9* [#<procedure #f {()}>]
In /home/pnorcks/usr/share/lilypond/2.13.4/scm/lily.scm:
 726: 10* [ly:parse-file "spacing-loose-grace-linebreak.ly"]
In /home/pnorcks/usr/share/lilypond/2.13.4/ly/init.ly:
  42: 11* (let* ((book-handler #)) (cond (# #) (# #)))
  45: 12  (cond (# #) (# #))
In /home/pnorcks/usr/share/lilypond/2.13.4/scm/lily-library.scm:
    ...
 165: 13  [ly:book-process #<Book> #< Output_def> ...]
In unknown file:
   ?: 14* [ly:optimal-breaking #<Paper_book>]
   ?: 15* [page-stencil #]
In /home/pnorcks/usr/share/lilypond/2.13.4/scm/page.scm:
 328: 16* (if (not (ly:stencil? #)) (page-set-property! page (quote stencil) ...))
 333: 17  [ly:prob-set-property! # stencil ...
 333: 18* [make-page-stencil #]
 209: 19  (let* (# # # # ...) (if # #) (if # #) ...)
 288: 20* [map #<procedure #f (system)> (# #)]
In unknown file:
   ?: 21* [#<procedure #f #> #]
In /home/pnorcks/usr/share/lilypond/2.13.4/scm/page.scm:
 242: 22* (let* (# # #) (add-to-page stencil # y) (if # #) ...)
 246: 23* [#<procedure #f (stencil x y)> #<Stencil  > 0.0 {()}]
 232: 24  (set! page-stencil (ly:stencil-add page-stencil #))
 233: 25* [ly:stencil-add #<Stencil  > ...
 234: 26* [ly:stencil-translate #<Stencil  > ...
 235: 27* [cons 0.0 ...
 237: 28* [- 0 {()} 2.84527559055118]

/home/pnorcks/usr/share/lilypond/2.13.4/scm/page.scm:237:68: In procedure - in expression (- 0 y ...):
/home/pnorcks/usr/share/lilypond/2.13.4/scm/page.scm:237:68: Wrong type: ()