Opening book and quill during death doesn't drop it.

With the snapshot 15w31b I was fooling around with fall damage to death, and then I was messing around with how minecraft would react when opening the book and quill at the same time. I found that it didn't drop the book and quil.

I made a quick video clip showing what I was doing: https://www.youtube.com/watch?v=BbSTBzighx4&feature=youtu.be