Xray vision exploit

Steps to reproduce:

1. Dig a 1x1 hole at least 2 blocks deep and jump into it.
2. Drink a potion of invisibility.
3. Drink a potion of night vision.
4. Place 2 sand above you so that it falls down and buries you. Note: If in survival mode, you will begin to suffocate.
5. Switch to third person view (either front or back).

Expected results:
You see the sand surrounding your head.

Actual results:
You see an x-ray view revealing the locations of caves and openings underground.

Link to video demonstrating how to reproduce:
https://youtu.be/RdFWkGqBt5M?list=WL&t=1255