Chest Crash.
I was playing on my Creative world (superflat preset Overworld) and I had
put an item in a chest in 1.6.4 and when I went back to 1.7.2 and opened the chest, the whole game just crashed.
Steps to Reproduce
1. Put an item in a chest in 1.6.4 that doesn't exist in 1.7.2 (such as something called tile.null.name)
2. Reload the game in 1.7.2 and open the chest.
Duplicate of MC-30938 - If you have not , please use the search function in the future, to see if your bug has already been submitted. If you could not find the original report, please comment with the keywords you searched for.