OS: Windows 7 (ver 6.1, arch amd64)
Java: 1.8.0_31 (by Oracle Corporation)
Launcher: Minecraft Launcher 1.6.61 (bootstrap 4)
Minecraft: 1.10.1 (updated Wed Jun 22 05:14:48 CDT 2016)
Put the summary of the bug you're having here
What I expected to happen was...: The game not crashing?
Describe what you thought should happen here: Nothing unusual.
What actually happened was...: Game / java crashed
Describe what happened here I was modifying my Iron farm. I had previously built a Villager breeder over 80 blocks away (separate village), and used an aqueduct to bring Villagers to a new holding area by the Iron farm. I was culling villagers from the old holding pen, and modifying the pen with Jack-O-Lanterns in preparation to turn it into more wheat farmland. Game crashed during that process.
Of note: I do have an automated Pumpkin farm right next to the Iron farm, that uses Sticky Pistons to harvest the Pumpkins at regular intervals based upon a dual slaved Hopper clock.