Error when decompiling specific test case

[rbonifacio]

When we try to decompile this code:

public class Vanilla {
    public static void main(String[] args) {
        List<Student> students = Collections.emptyList();
        students.add(new Student("Pedro", 30));
        students.add(new Student("João", 25));

        Predicate<Student> p = s -> s.name == "Pedro";

        Vanilla v = new Vanilla();

    }

    public List<Student> vanilla(List<Student> students, Predicate<Student> p, Function<Student, Student> f) {
        List<Student> result = Collections.emptyList();
        boolean over = false;

        while(!over) {
            List<Student> sub = auxState.subList(0, auxState.size());

            if(p.test(auxState.get(0))) {
                result.add(f.apply(auxState.get(0)));
            }

            auxState = sub;
                }

        return result;
    }

    public List<Student> withFStream(List<Student> students, Predicate<Student> p, Function<Student, Student> f) {
        return Collections.emptyList();
    }

An exception occurs:

java.util.EmptyStackException
    at java.base/java.util.Stack.peek(Stack.java:102)
    at java.base/java.util.Stack.pop(Stack.java:84)
    at lang.jimple.internal.Decompiler$InstructionSetVisitor.returnIns(Decompiler.java:1269)