Attribute Filter Crash

So i was editing my adventure map, and was using this new AddAttribute filter for MCedit by sethbling, and suddenly when i entered the game, destroyed the chest with the new item, picked up the item, then scrolled onto it, it crashed.

I hoped for that it would give an attribute, and i did it to several items, but then it just crashed my save instead.

What I did was.
1. Making a chest with any kind of item (ingame).
2. Went to MCedit where i used the AddAttribute filter from Sethbling
to get some attributes on the item in the chest.
3. Opened my Minecraft World Save, and scrolled over the item when I had picked it up.
4. Crashed.