\version "2.9.24"
\context Voice \transpose c c'' {
c8 c4
c c c c c c c c c c c c c c c c
c c c c c c c c c c c c c c c c
c c c c c c c c c c c c c c c c
c c c c c c c c c c c c c c c c
c c c c c c c c c c c c c c c c
c c c c c c c c c c c c c c c c
}
the leading "c8" causes that never in this score a barline coincides
with a note starting/ending. As a result, no line break is found for
this score, and the whole score is printed in a single line, thus
exceeding the right margin of the paper.
I think, the score should, regardless of the missing coincidence, still
be breakable at each of the barlines. Or I am missing something?