Silk Touch on frosted ice drops air item

Confirmed.

Confirmed for

• 15w42a

Relates to:

• MC-11834

This issue derivative :
Clients launcher large number of spam:
[xx:xx:xx] [Server / Client thread/ERROR]: Item entity xxxxxx has no item?!

Reproduce video:
https://www.youtube.com/watch?v=jvLk_PqD0lY

Reproduce steps:
1. ✔ Transmitter settings:(Launcher Visibility = Keep the launcher open)
2.Use Silk Touch damage Frosted Ice.
3.Saved back to the menu screen.
4.Enter the world again.
5.Observation of launcher.

Link: MC-90754

Confirmed for 15w43a

Still in 15w44a. Mining frost block with silk touch results in an unknown item entity. Picking it up crashes server and kicks everybody out.

Confirmed for 15w44b

Seems to be fixed in 15w45a

Confirmed fixed.