Issue 1972 in lilypond: Seg fault and 100% CPU when using \override Staff.StaffSymbol #'ledger-positions

[lilypond]

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

New issue 1972 by address@hidden: Seg fault and 100% CPU when using  
\override Staff.StaffSymbol #'ledger-positions
http://code.google.com/p/lilypond/issues/detail?id=1972

Reported by James Lowe:

% this produces a segfault
\version "2.15.13"
\relative c' {
  \override Staff.StaffSymbol #'ledger-positions = #'(1)
  c4
}