[Lilypond-auto] Issue 4273 in lilypond: Assertion failure with `ly:page-turn-breaking'

[lilypond]

Status: Accepted
Owner: ----
Labels: Type-Crash

New issue 4273 by address@hidden: Assertion failure with  
`ly:page-turn-breaking'
https://code.google.com/p/lilypond/issues/detail?id=4273

[release/2.19.15-1-171-ge86b2ea]

The input

  \version "2.19.16"

  \paper {
    #(define page-breaking ly:page-turn-breaking)
    system-count = 5
  }

  \score {
    \new PianoStaff {
      <<
        \new Staff { \repeat unfold 160 { c'8 c'' } }
        \new Staff { \repeat unfold 160 { c8 c' } }
      >>
    }
  }

makes lilypond crash with

  GNU LilyPond 2.19.16
  Processing `bug.ly'
  Parsing...
  Interpreting music...[8][16][24][32][40]
  Preprocessing graphical objects...
  Calculating page and line breaks (1 possible page breaks)...
  lilypond: page-turn-page-breaking.cc:210:
    void Page_turn_page_breaking::calc_subproblem(vsize):
      Assertion `!isinf (best.demerits_) && start < end - 1' failed.
  Aborted


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