The forbidden item = Item number 175 with data value of 6.

I was playing with the /setblock command, and using the tall flowers (Item 175 0 through 175 5) It made the bottom halves of the flowers. I tried to use /setblock for 175 with data of 6, thinking it would give me the top halves of the flowers.
Instead of getting my top halves of flowers, I crashed. I tried it again, and it did the same things. It also works with /give [name] 175 1 6

Steps to Reproduce:
1. It doesn't matter the gamemode, so this step is useless.
2. I used the command /setblock ~0 ~0 ~0 175 6, but you can also use any coordinates (tested for proof)
3. /give [name] 175 1 6 also works.