  def testBoostedTreesCalculateBestFeatureSplitSecurity2(self):
    with self.assertRaises((errors.InvalidArgumentError, ValueError)):
      gen_boosted_trees_ops.boosted_trees_calculate_best_feature_split(
          node_id_range=[0, 8],
          stats_summary=[[[[1.0], [2.0], [3.0]]]],
          l1=[0.5],
          l2=[0.5],
          tree_complexity=[0.1],
          min_node_weight=[1.0],
          logits_dimension=8)
A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit.