Crash on bad_alloc

[Ben Englert]

> I'm not top posting.
I have included a file which crashes lilypond 2.13 with the included output.
The same file engraves without problems on 2.12.

lilypond assemble.ly 
GNU LilyPond 2.13.21
Processing `assemble.ly'
Parsing...
Interpreting music... [8]
Preprocessing graphical objects...
Solving 2 page-breaking chunks...[1: 1 pages][2: 1 pages]
Drawing systems...terminate called after throwing an instance of 
'std::bad_alloc'
  what():  std::bad_alloc
Aborted

File follows:

\version "2.13.21"

PartPOneVoiceSix =  \relative bes {
 r4 a'4 ( -. -1 d,4 -. -2 a4 -. -1 s1 s1 \break s1 s1 s1 |
 <f a>2 <g, d'>2 ~ ~ \pageBreak s1 s1 s1 \clef "treble" s1 s1 \clef
 "bass" s1 \break |
 bes2. e,4 ) -3 \bar "||"
}

% The score definition
\new PianoStaff <<
    \context Staff = "1" <<
        >> \context Staff = "2" <<
         \context Voice = "PartPOneVoiceSix" { \voiceTwo \PartPOneVoiceSix }
        >>
    >>