programming error: Skipped something ?! (Continuing; cross thumbs)

[Erik Sandberg]

Hi,

The following score makes Lilypond output a few "programming error" messages. 
The dvi output looks all right AFAICS, but I guess those messages indicate 
that something strange is going on. Using debian's 1.6.0-1_i386 package.

\version "1.6.0"

\score {
 \notes \relative c'' {
  \clef "treble"
  \property Voice.tupletSpannerDuration = #(make-moment 1 4)
  \key g\major
  \time 2/2
%page 11
  \partial 4 d4 |
  d \grace{c8} b16 a b c \times 2/3 {[d8 d d] [d d d]} |
  e4 e16 d e fis \times 2/3 {[g8 g g] [g fis e]} |
  d4 b16 a b c \times 2/3 {[d8 d d] [d c b]} |
  %4
  a4 a16 g a b \times 2/3 {[c8 c c] [c b a]} |
  b4 d16 c d e \times 2/3 {[g8 fis e] [g fis e]} |
  cis4 e16 d e fis \times 2/3 {[e8 fis g] [g fis e]} |
  fis4 \times 2/3 {[a8 g fis] [fis e d] [a' g fis]} |
  %8
  e4 \times 2/3 {[g8 a b] [a g fis] [e d cis]} |
  d4 \times 2/3 {[a'8 g fis] [fis e d] [a' g fis]} |
  e4 \times 2/3 {[g8 a b] [a g fis] [e d cis]} |
  \times 2/3 {[d8 a' fis] [fis d d] [d a a] [a fis fis]} |
  %12
  fis2 r4 a'4 |
  a4 fis16 e fis g \times 2/3 {[a8 a a] [a a a]} |
%page 12
  b4 b,16 a b cis \times 2/3 {[d8 d d] [d cis b]} |
  a4 fis'16 e fis g \times 2/3 {[a8 a a] [a g fis]} |
  %16
  e4 g16 fis g a \times 2/3 {[g8 g g] [g fis e]} |
  d4 fis,16 e fis g \times 2/3 {[a8 a a] [a g fis]} |
  e4 e16 d e fis \times 2/3 {[g8 g g] [g fis e]} |
  \times 2/3 {[d fis fis] [fis a a] [a d d] [d f f]} |
  %20
  \times 2/3 {[f? e d] [f e d] [c b a] [a b c]} |
  \times 2/3 {[c a a] [a c c] [c fis fis] [fis a a]} |
  \times 2/3 {[a a, b] [c b a] [b a b] [d c d]} |
  \times 2/3 {[g d g] [g d g]} g4 e |
  %24
  \times 2/3 {[d8 e d] [c b a]} g4 \times 2/3 {[d'8 c b]} |
  \times 2/3 {[b a b] [d c b] [b c d] [e fis g]} |
  \times 2/3 {[fis e d] [c b a]} g2
  \bar "|."
 }
 \paper {}
}


Output:

Running LilyPond...
GNU LilyPond 1.6.0
Now processing: `score.ly'
Parsing...
Interpreting music...[8]programming error: Skipped something ?! (Continuing; 
cross thumbs)
[16][24]programming error: Skipped something ?! (Continuing; cross thumbs)
programming error: Skipped something ?! (Continuing; cross thumbs)
[27]
Preprocessing elements... 
Calculating column positions... [3][6][9][12][15][18][21][24][27][28]
paper output to `score.tex'...

Analyzing score.tex...
Running LaTeX...
DVI output to `score.dvi'...