Verification builds:
1.9.0.2 Beta | Windows 10: Yes
1.7.1 | Windows 10: No

Summary:
If the player runs the kill command while sleeping in a bed, they wake up in a dead state, either invisible, or in a lying down position and tinted red, but still able to run around and play the game. They are are immune to further damage though.

Steps to Reproduce:

1. Create a new world
2. Set the difficulty to Peaceful
3. Place a bed
4. Change to Survival
5. Set the time to night
6. Sleep in the bed
7. Type in chat "/kill"

Observed Results:
The player is killed, but also 'wakes up' after sleeping in a semi dead state, able to play as normal, but is immune to damage.

Expected Results:
The player should respawn correctly.

Screenshots/Videos attached: Yes

Notes: