I was messing around with the /give command and discovered a little troll enchantment. I gave myself a diamond sword with an enchantment ID #22, without knowing what the ID 22 was. When I got the item in my inventory, It had the purple glow of an enchanted item, but when I moused over it in my inventory menu it had no enchantments listed. I went to an anvil and decided to rename it "Fake Enchanted Sword." when I put the item in the first anvil slot, my game froze and crashed. I was using 1.7.5 when it happened, but 1.7.5 didn't show up in the "Affects Version/s" menu, and I think it could effect all 1.7 versions.

What I expected to happen:
Be able to rename a sword that didn't really have an enchantment on it.

What actually happened:
I crashed.

Steps to Reproduce:
1. type this exact command:

/give @p diamond_sword 1 0 {ench:[

]}

2. You'll see in your inventory that the sword actually doesn't have an enchantment. Enter an anvil's menu and put the sword in the first slot. As soon as you do, you'll crash.

PS: Sorry if this is a duplicate report, I used the search but I couldn't find anything similar.