Do have I found a bug ?

[Alexandre Beneteau]

Hello,

Compiling this ly file with lilypond 1.7.12 give me strange results (and 
errors messages)

Has anybody an idea ? Is it my mistake ??? (See png file joined for result)

Thanks,

        Alex.

\header {tagline = ""}
\score {
  \notes \relative c {
    \time 3/4
    \clef "bass"
    % one after the other : no problem
    \repeat unfold 4  { a2.-\trill } d,4--_#'(italic "divisi.") ~ d8 r 
r4 \repeat unfold 3 { d4-- ~ d8 r r4 }
    % the two at the same time, using < \\ > syntax (with repeat unfold 
statements)
    < \repeat unfold 4  { a'2.-\trill } \\ d,4--_#'(italic "divisi.") ~ 
d8 r r4 \repeat unfold 3 { d4-- ~ d8 r r4 } >
    % the two at the same time (< \\ > syntax), typing all the notes
    < a'2.-\trill a2.-\trill a2.-\trill a2.-\trill \\ d,4--_#'(italic 
"divisi.") ~ d8 r r4 | d4--_#'(italic "divisi.") ~ d8 r r4 | 
d4--_#'(italic "divisi.") ~ d8 r r4 | d4--_#'(italic "divisi.") ~ d8 r r4 >
  }
}

Analyzing test.tex...
Running latex...
Running dvips...
DVI output to `test.dvi'...
PS output to `test.ps'...
bash-2.05a$ ly2dvi -P test.ly 2>&1 > log
ly2dvi (GNU LilyPond) 1.7.12
Running lilypond...GNU LilyPond 1.7.12
Now processing: `test.ly'
Parsing...
Interpreting music...[8]
/home/alex/documents/partitions/CNSM/Orchestration/Laboratoires/2003/test.ly:9:71: 
warning: Adding note head to incompatible stem (type = 4):
    < \repeat unfold 4  { a'2.-\trill } \\ d,4--_#'(italic "divisi.") ~

 d8 r r4 \repeat unfold 3 { d4-- ~ d8 r r4 } >

/home/alex/documents/partitions/CNSM/Orchestration/Laboratoires/2003/test.ly:9:74: 
warning: Adding note head to incompatible stem (type = 4):
    < \repeat unfold 4  { a'2.-\trill } \\ d,4--_#'(italic "divisi.") ~ d8

    r r4 \repeat unfold 3 { d4-- ~ d8 r r4 } >

/home/alex/documents/partitions/CNSM/Orchestration/Laboratoires/2003/test.ly:11:82: 
warning: Adding note head to incompatible stem (type = 4):
    < a'2.-\trill a2.-\trill a2.-\trill a2.-\trill \\ d,4--_#'(italic 
"divisi.") ~

            d8 r r4 | d4--_#'(italic "divisi.") ~ d8 r r4 | 
d4--_#'(italic "divisi.") ~ d8 r r4 | d4--_#'(italic "divisi.") ~ d8 r r4 >

/home/alex/documents/partitions/CNSM/Orchestration/Laboratoires/2003/test.ly:11:85: 
warning: Adding note head to incompatible stem (type = 4):
    < a'2.-\trill a2.-\trill a2.-\trill a2.-\trill \\ d,4--_#'(italic 
"divisi.") ~ d8

               r r4 | d4--_#'(italic "divisi.") ~ d8 r r4 | 
d4--_#'(italic "divisi.") ~ d8 r r4 | d4--_#'(italic "divisi.") ~ d8 r r4 >

/home/alex/documents/partitions/CNSM/Orchestration/Laboratoires/2003/test.ly:11:120: 
warning: Adding note head to incompatible stem (type = 4):
    < a'2.-\trill a2.-\trill a2.-\trill a2.-\trill \\ d,4--_#'(italic 
"divisi.") ~ d8 r r4 | d4--_#'(italic "divisi.") ~

                                                  d8 r r4 | 
d4--_#'(italic "divisi.") ~ d8 r r4 | d4--_#'(italic "divisi.") ~ d8 r r4 >

/home/alex/documents/partitions/CNSM/Orchestration/Laboratoires/2003/test.ly:11:123: 
warning: Adding note head to incompatible stem (type = 4):
    < a'2.-\trill a2.-\trill a2.-\trill a2.-\trill \\ d,4--_#'(italic 
"divisi.") ~ d8 r r4 | d4--_#'(italic "divisi.") ~ d8

                                                     r r4 | 
d4--_#'(italic "divisi.") ~ d8 r r4 | d4--_#'(italic "divisi.") ~ d8 r r4 >

/home/alex/documents/partitions/CNSM/Orchestration/Laboratoires/2003/test.ly:11:158: 
warning: Adding note head to incompatible stem (type = 4):
    < a'2.-\trill a2.-\trill a2.-\trill a2.-\trill \\ d,4--_#'(italic 
"divisi.") ~ d8 r r4 | d4--_#'(italic "divisi.") ~ d8 r r4 | 
d4--_#'(italic "divisi.") ~


                 d8 r r4 | d4--_#'(italic "divisi.") ~ d8 r r4 >

/home/alex/documents/partitions/CNSM/Orchestration/Laboratoires/2003/test.ly:11:161: 
warning: Adding note head to incompatible stem (type = 4):
    < a'2.-\trill a2.-\trill a2.-\trill a2.-\trill \\ d,4--_#'(italic 
"divisi.") ~ d8 r r4 | d4--_#'(italic "divisi.") ~ d8 r r4 | 
d4--_#'(italic "divisi.") ~ d8


                    r r4 | d4--_#'(italic "divisi.") ~ d8 r r4 >

/home/alex/documents/partitions/CNSM/Orchestration/Laboratoires/2003/test.ly:11:196: 
warning: Adding note head to incompatible stem (type = 4):
    < a'2.-\trill a2.-\trill a2.-\trill a2.-\trill \\ d,4--_#'(italic 
"divisi.") ~ d8 r r4 | d4--_#'(italic "divisi.") ~ d8 r r4 | 
d4--_#'(italic "divisi.") ~ d8 r r4 | d4--_#'(italic "divisi.") ~


                                                       d8 r r4 >

/home/alex/documents/partitions/CNSM/Orchestration/Laboratoires/2003/test.ly:11:199: 
warning: Adding note head to incompatible stem (type = 4):
    < a'2.-\trill a2.-\trill a2.-\trill a2.-\trill \\ d,4--_#'(italic 
"divisi.") ~ d8 r r4 | d4--_#'(italic "divisi.") ~ d8 r r4 | 
d4--_#'(italic "divisi.") ~ d8 r r4 | d4--_#'(italic "divisi.") ~ d8


                                                          r r4 >
[14]
Preprocessing graphical objects...
Calculating line breaks... [3][6][9][12][14]
paper output to `test.tex'...