Put the summary of the bug you're having here

What I expected to happen was...:
Getting a enchanted sword.

What actually happened was...:
Both the book and the sword disapear

Steps to Reproduce:
1. Get an anvil
2. Get an enchanted book
3. Get something to enchant
4. Get the xp need for the enchant
5. Enchant it
6. Realise you lose all your xp, the book and the item you wanted to enchant,