When you use the /fill command on an 80x80 area the command says that you cannot place blocks outside the world even though no blocks are being placed outside of it.

Note: My render distance is 10 chunks (160 blocks), so, an 80x80 area should not be a problem.

Steps to Reproduce:
1. Make or open a world
2. Use the following command: "/fill ~-80 ~ ~-80 ~80 ~ ~80 [any block] 0"
3. Try again if its necessary.

Observed Results:
I received the following message: "Cannot place blocks outside the world"
Expected Results:
The command should work properly or throw an error of "too many blocks in the selected area"