IndexOutOfBoundsException when calling PolygonsSet.getSize()

Running the following code produces an IndexOutOfBoundsException:

public static void main(String[] args)

{ List<Vector2D> vectors = new ArrayList<>(); vectors.add(new Vector2D(1, 1)); vectors.add(new Vector2D(1_189, 1)); vectors.add(new Vector2D(1_697_165, 147)); vectors.add(new Vector2D(1_592_444, 249_323)); vectors.add(new Vector2D(248_665, 110_887)); vectors.add(new Vector2D(37_142, 24_654)); vectors.add(new Vector2D(10_093, 8_137)); vectors.add(new Vector2D(966, 823)); vectors.add(new Vector2D(25, 25)); new MonotoneChain().generate(vectors).createRegion().getSize(); }

Forgive the weird vector values!