In the new minecraft 1.9 snapshot, there is a bug around Bows and Books, whenever you try to enchant them in the Enchantment table.

What i expected to happen was the normal thing, enchanting a Book and my Bow after defeating the Ender Dragon in the new snapshot.

What actually happened was quite simple, as i enchanted some books i noticed they changed to "Enchanted Books" but had no enchantment with them, after using F3+H i noticed that the enchanted books had no NBT Tags with them.

After a while, i tried to enchant a Bow, but as i hitted the buttons, the only thing that happened was me running out of experience and lapis lazuli, trying to get something on my Bow, I ended up using all the experience from the ender dragon and still got nothing.

The Book bug :
1. Put an enchantment table, give yourself a bow, a book and lapis lazuli
2. Enchant the bow and the book
3. notice how the book turns into an enchanted book, but has 0 NBT Tags ( it has no "attached" enchantment )

The Bow bug :
1. Give yourself an enchantment table, a bow, lapis lazuli and some experience
2. Try to enchant the Bow as much as you can, in any single possible lvl
3. watch as you run out of Lapis and experience, yet your bow has no enchantment with it