Spacing bug: text exceeding page footer

[Nicolas Sceaux]

%%% in the first page, text spread on the page footer (and beyond)
%%% before breaking to the next one.
\version "2.13.4"
#(set-default-paper-size "a6")
\markuplines \huge {
  00 01 02 03 04 05 06 07 08 09
  10 11 12 13 14 15 16 17 18 19
  20 21 22 23 24 25 26 27 28 29
  30 31 32 33 34 35 36 37 38 39
}