// if match: returns -1
// if no match: returns how many conditions were met
static int matchConditions_random(L<Lisp> conditions, Map<S, Lisp> m) {
  if (empty(conditions)) ret -1;
  Lisp condition = first(conditions);
  Map<S, Lisp> m2 = cloneMap(m);
  if (!matchCondition_random(condition, m2)) {
    print("Condition failed: " + condition);
    ret 0;
  }
  print("Condition matched, " + struct(m2));
  int n = matchConditions_random(dropFirst(conditions), m2);
  if (n == -1) {
    m.putAll(m2);
    ret -1;
  }
  ret n+1; // failure
}