Error when resizing terrain?

Unity Engine
1

When i try to re-size the terrains width and length in resolution greater then 500 it gives me this error twice in console:
j - i == terrainChunksInfo.numChunksInX * terrainChunksInfo.numChunksInY

Why is this happening and how can i stop it, it’s not affecting game-play or anything but its annoying to see it in console.

2

I don’t see this in Unity 5.2.1f1. I created a terrain, saw its size was 500x500, and proceeded to set it (in the editor) to larger sizes, pressed Play, and there were no errors.