when entering an already created world i found that all of my chests had disappeared as well as all the trees and planted crops (wheat, carrots, potatoes, and cactus) in the savanna biome where i was living had also dissapeared
Comments 4
Look at info about what you have updated to before posting:
"If you are updating from 14w26a or 14w26b, your saved world has corrupted blocks and it will be heavily damaged once you open it in 14w26c. Please use a world backup that was saved with a pre-14w26 version.
Never use snapshots without first making backups of your saved worlds."
Source: https://mojang.com/2014/06/minecraft-snapshot-14w26a/
Did you play/load the world in 14w26a and b?