Comment #5 on issue 2589 by [email protected]: cyclic dependency when tempo, slur, and script present
http://code.google.com/p/lilypond/issues/detail?id=2589
More likely Heisenbug territory. Confusion of Scheme data with integer data types, lack of garbage protection, off-by-one stuff. The sort of thing depending on memory layout. The sort of thing that changes under logically unrelated conditions.
