Sliced list cannot be made linear

[mikeb-btw]

I am using version 0.2.0-alpha6.

In the following, a list of size 1 is sliced to make another list of size 1 that is then correctly made linear.

Then, a list of size 2 is sliced into a list of size 1. This new list is attempted to be made linear but that fails.

import io.lacuna.bifurcan.IList;
import io.lacuna.bifurcan.LinearList;

public class Main {
  public static void main(String[] args) {
    LinearList<Integer> list1 = new LinearList<>();
    list1.addLast(1);
    IList<Integer> slice1 = list1.slice(0, 1).linear();
    System.out.println("Slice 1 is linear: " + slice1.isLinear());

    LinearList<Integer> list2 = new LinearList<>();
    list2.addLast(1);
    list2.addLast(2);
    IList<Integer> slice2 = list2.slice(0, 1).linear();
    System.out.println("Slice 2 is linear: " + slice2.isLinear());
  }
}

The output is:

Slice 1 is linear: true
Slice 2 is linear: false

The output should be:

Slice 1 is linear: true
Slice 2 is linear: true