Add the following code to the Start method of any script attached to a gameobject in your current active scene and press Play. Unity crashes!

TerrainData ter = new TerrainData();
ter.heightmapResolution = int.MaxValue;
ter.SetDetailResolution(int.MinValue, -1);
ter.GetAlphamaps(int.MinValue, int.MinValue, 1, int.MaxValue);
ter.heightmapResolution = int.MaxValue;

These APIs need to be sanitized.