David Nalesnik <david.nales...@gmail.com> writes: > It turns out that the my definition of event-drul as '(() . ()) was > the problem. I substituted (cons '() '()) and everything works just > fine...even with the file that gave you the issues with multiple > staves. I don't understand why '(() . ()) and (cons '() '()) aren't > equivalent.
The problem is rather that '(() . ()) is equivalent, like eq?, with itself. It is a constant, meaning that on a second run, the _same_ cons cell is being used as in the first run, even if you changed its car and cdr in the mean time. (cons '() '()) allocates a new cons cell for every run. '() itself is not a pair and so it is immutable and not susceptible to this problem. -- David Kastrup _______________________________________________ lilypond-devel mailing list lilypond-devel@gnu.org https://lists.gnu.org/mailman/listinfo/lilypond-devel
