Affects Version/s: Minecraft 1.13
Fix Version/s: None
Environment:Windows 10 Home;
Version 8 update 161 (java)
What I expected to happen was...:
When the player is on top of a slab block the sky/block light value shouldn't be 0.
What actually happened was...:
The light value is 0 during both night/day and with/without a light source block near the player.
Steps to Reproduce:
1. Place a slab block on the ground.
2. The player must be on top of the block (the y value has a .5, for example Y=66.5)