[MC-107291] Potion entity is marked as invalid, when you throw potions and press button Q

Potion entity is marked as invalid, when you throw potions and press button Q.

Affect the splash potion and lingering potion.

Reproduce steps:

Thrown potion.
Immediately press button Q.(Discard the hands of the potion.)
Potion entity becomes invalid and magenta.

Game Output:

[11:45:05] [Client thread/ERROR]: ThrownPotion entity 834 has no item?!
[11:45:05] [Client thread/ERROR]: ThrownPotion entity 834 has no item?!
[11:45:05] [Client thread/ERROR]: ThrownPotion entity 834 has no item?!
[11:45:05] [Client thread/ERROR]: ThrownPotion entity 834 has no item?!
[11:45:05] [Client thread/ERROR]: ThrownPotion entity 834 has no item?!
[11:45:05] [Client thread/ERROR]: ThrownPotion entity 834 has no item?!
[11:45:05] [Client thread/ERROR]: ThrownPotion entity 834 has no item?!
[11:45:05] [Client thread/ERROR]: ThrownPotion entity 834 has no item?!
[11:45:05] [Client thread/ERROR]: ThrownPotion entity 834 has no item?!
[11:45:05] [Client thread/ERROR]: ThrownPotion entity 834 has no item?!
[11:45:05] [Client thread/ERROR]: ThrownPotion entity 834 has no item?!
[11:45:05] [Client thread/ERROR]: ThrownPotion entity 834 has no item?!
[11:45:05] [Client thread/ERROR]: ThrownPotion entity 834 has no item?!
[11:45:05] [Client thread/ERROR]: ThrownPotion entity 834 has no item?!
[11:45:05] [Client thread/ERROR]: ThrownPotion entity 834 has no item?!
[11:45:05] [Client thread/ERROR]: ThrownPotion entity 834 has no item?!
[11:45:05] [Client thread/ERROR]: ThrownPotion entity 834 has no item?!
[11:45:05] [Client thread/ERROR]: ThrownPotion entity 834 has no item?!
[11:45:05] [Client thread/ERROR]: ThrownPotion entity 834 has no item?!
[11:45:05] [Client thread/ERROR]: ThrownPotion entity 834 has no item?!
[11:45:05] [Client thread/ERROR]: ThrownPotion entity 834 has no item?!
[11:45:05] [Client thread/ERROR]: ThrownPotion entity 834 has no item?!
[11:45:05] [Client thread/ERROR]: ThrownPotion entity 834 has no item?!
[11:45:05] [Client thread/ERROR]: ThrownPotion entity 834 has no item?!
[11:45:05] [Client thread/ERROR]: ThrownPotion entity 834 has no item?!
[11:45:05] [Client thread/ERROR]: ThrownPotion entity 834 has no item?!
[11:45:05] [Client thread/ERROR]: ThrownPotion entity 834 has no item?!
[11:45:05] [Client thread/ERROR]: ThrownPotion entity 834 has no item?!
[11:45:05] [Client thread/ERROR]: ThrownPotion entity 834 has no item?!
[11:45:05] [Client thread/ERROR]: ThrownPotion entity 834 has no item?!
[11:45:05] [Client thread/ERROR]: ThrownPotion entity 834 has no item?!
[11:45:05] [Client thread/ERROR]: ThrownPotion entity 834 has no item?!
[11:45:05] [Client thread/ERROR]: ThrownPotion entity 834 has no item?!
[11:45:05] [Client thread/ERROR]: ThrownPotion entity 834 has no item?!
[11:45:05] [Client thread/ERROR]: ThrownPotion entity 834 has no item?!
[11:45:05] [Client thread/ERROR]: ThrownPotion entity 834 has no item?!
[11:45:05] [Client thread/ERROR]: ThrownPotion entity 834 has no item?!
[11:45:05] [Client thread/ERROR]: ThrownPotion entity 834 has no item?!
[11:45:05] [Client thread/ERROR]: ThrownPotion entity 834 has no item?!
[11:45:05] [Client thread/ERROR]: ThrownPotion entity 834 has no item?!
[11:45:05] [Client thread/ERROR]: ThrownPotion entity 834 has no item?!
[11:45:05] [Client thread/ERROR]: ThrownPotion entity 834 has no item?!
[11:45:05] [Server thread/ERROR]: ThrownPotion entity 834 has no item?!
[11:45:05] [Client thread/ERROR]: ThrownPotion entity 834 has no item?!
[11:45:05] [Client thread/ERROR]: ThrownPotion entity 834 has no item?!
[11:45:05] [Client thread/ERROR]: ThrownPotion entity 834 has no item?!

Environment

OS: Windows 10 64-bit
Java 8 version: 1.8.0_101-b13 64-bit
CPU: Intel(R) Core(TM) i5-4460 CPU @ 3.20GHz
GPU: NVIDIA GeForce GTX 650
Drivers: GeForce 372.90
RAM: 24GB