public List getModifiedVariable() {
final ArrayList list = new ArrayList();
for (int i = 0; i < vars.length; i++) {
- list.addAll(vars[i].getUsedVariable());
+ if (vars[i] != null) {
+ list.addAll(vars[i].getUsedVariable());
+ }
}
if (expression != null) {
list.addAll(expression.getModifiedVariable());