So appearently beetroots generated in villages make Forge crash. This is the log given out in eclipse. I was walking in a new generated world  and then the game crashed. I'm using Forge version 12.16.0.1767

---- Minecraft Crash Report ----
// Why is it breaking 

Time: 05/04/16 17.22
Description: Ticking entity

java.lang.IllegalArgumentException: Cannot get property PropertyInteger{name=age, clazz=class java.lang.Integer, values=[0, 1, 2, 3, 4, 5, 6, 7]} as it does not exist in BlockStateContainer{block=minecraft:beetroots, properties=[age]}
at net.minecraft.block.state.BlockStateContainer$StateImplementation.getValue(BlockStateContainer.java:192)
at net.minecraft.block.BlockCrops.getDrops(BlockCrops.java:182)
at net.minecraft.block.Block.dropBlockAsItemWithChance(Block.java:640)
at net.minecraft.block.BlockCrops.dropBlockAsItemWithChance(BlockCrops.java:205)
at net.minecraft.block.Block.dropBlockAsItem(Block.java:630)
at net.minecraft.world.World.destroyBlock(World.java:446)
at net.minecraft.entity.ai.EntityAIHarvestFarmland.updateTask(EntityAIHarvestFarmland.java:89)
at net.minecraft.entity.ai.EntityAITasks.onUpdateTasks(EntityAITasks.java:111)
at net.minecraft.entity.EntityLiving.updateEntityActionState(EntityLiving.java:836)
at net.minecraft.entity.EntityLivingBase.onLivingUpdate(EntityLivingBase.java:2334)
at net.minecraft.entity.EntityLiving.onLivingUpdate(EntityLiving.java:630)
at net.minecraft.entity.EntityAgeable.onLivingUpdate(EntityAgeable.java:177)
at net.minecraft.entity.EntityLivingBase.onUpdate(EntityLivingBase.java:2160)
at net.minecraft.entity.EntityLiving.onUpdate(EntityLiving.java:343)
at net.minecraft.world.World.updateEntityWithOptionalForce(World.java:2086)
at net.minecraft.world.WorldServer.updateEntityWithOptionalForce(WorldServer.java:864)
at net.minecraft.world.World.updateEntity(World.java:2051)
at net.minecraft.world.World.updateEntities(World.java:1882)
at net.minecraft.world.WorldServer.updateEntities(WorldServer.java:637)
at net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:779)
at net.minecraft.server.MinecraftServer.tick(MinecraftServer.java:683)
at net.minecraft.server.integrated.IntegratedServer.tick(IntegratedServer.java:155)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:532)
at java.lang.Thread.run(Unknown Source)


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Stacktrace:
at net.minecraft.block.state.BlockStateContainer$StateImplementation.getValue(BlockStateContainer.java:192)
at net.minecraft.block.BlockCrops.getDrops(BlockCrops.java:182)
at net.minecraft.block.Block.dropBlockAsItemWithChance(Block.java:640)
at net.minecraft.block.BlockCrops.dropBlockAsItemWithChance(BlockCrops.java:205)
at net.minecraft.block.Block.dropBlockAsItem(Block.java:630)
at net.minecraft.world.World.destroyBlock(World.java:446)
at net.minecraft.entity.ai.EntityAIHarvestFarmland.updateTask(EntityAIHarvestFarmland.java:89)
at net.minecraft.entity.ai.EntityAITasks.onUpdateTasks(EntityAITasks.java:111)
at net.minecraft.entity.EntityLiving.updateEntityActionState(EntityLiving.java:836)
at net.minecraft.entity.EntityLivingBase.onLivingUpdate(EntityLivingBase.java:2334)
at net.minecraft.entity.EntityLiving.onLivingUpdate(EntityLiving.java:630)
at net.minecraft.entity.EntityAgeable.onLivingUpdate(EntityAgeable.java:177)
at net.minecraft.entity.EntityLivingBase.onUpdate(EntityLivingBase.java:2160)
at net.minecraft.entity.EntityLiving.onUpdate(EntityLiving.java:343)
at net.minecraft.world.World.updateEntityWithOptionalForce(World.java:2086)
at net.minecraft.world.WorldServer.updateEntityWithOptionalForce(WorldServer.java:864)
at net.minecraft.world.World.updateEntity(World.java:2051)

-- Entity being ticked --
Details:
Entity Type: Villager (net.minecraft.entity.passive.EntityVillager)
Entity ID: 88
Entity Name: Villager
Entity's Exact location: 189,55, 70,00, 356,80
Entity's Block location: World: (189,70,356), Chunk: (at 13,4,4 in 11,22; contains blocks 176,0,352 to 191,255,367), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Entity's Momentum: -0,01, -0,08, 0,11
Entity's Passengers: []
Entity's Vehicle: ~~ERROR~~ NullPointerException: null
Stacktrace:
at net.minecraft.world.World.updateEntities(World.java:1882)
at net.minecraft.world.WorldServer.updateEntities(WorldServer.java:637)

-- Affected level --
Details:
Level name: New World
All players: 1 total; [EntityPlayerMP['Player124'/274, l='New World', x=297,71, y=77,01, z=222,07]]
Chunk stats: ServerChunkCache: 626 Drop: 0
Level seed: -3920674869502656299
Level generator: ID 00 - default, ver 1. Features enabled: true
Level generator options: 
Level spawn location: World: (256,64,248), Chunk: (at 0,4,8 in 16,15; contains blocks 256,0,240 to 271,255,255), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Level time: 325 game time, 325 day time
Level dimension: 0
Level storage version: 0x04ABD - Anvil
Level weather: Rain time: 44845 (now: false), thunder time: 103162 (now: false)
Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: true
Stacktrace:
at net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:779)
at net.minecraft.server.MinecraftServer.tick(MinecraftServer.java:683)
at net.minecraft.server.integrated.IntegratedServer.tick(IntegratedServer.java:155)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:532)
at java.lang.Thread.run(Unknown Source)

-- System Details --
Details:
Minecraft Version: 1.9
Operating System: Windows 7 (amd64) version 6.1
Java Version: 1.8.0_74, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 201135608 bytes (191 MB) / 904921088 bytes (863 MB) up to 1890582528 bytes (1803 MB)
JVM Flags: 0 total; 
IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
FML: MCP 9.23 Powered by Forge 12.16.0.1767 4 mods loaded, 4 mods active
States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored
UCHIJAAAA	mcp{9.19} [Minecraft Coder Pack] (minecraft.jar) 
UCHIJAAAA	FML{8.0.99.99} [Forge Mod Loader] (forgeSrc-1.9-12.16.0.1767-1.9.jar) 
UCHIJAAAA	Forge{12.16.0.1767} [Minecraft Forge] (forgeSrc-1.9-12.16.0.1767-1.9.jar) 
UCHIJAAAA	mw{0.6.1} [MineWorld] (bin) 
Loaded coremods (and transformers): 
GL info: ~~ERROR~~ RuntimeException: No OpenGL context found in the current thread.
Profiler Position: N/A (disabled)
Player Count: 1 / 8; [EntityPlayerMP['Player124'/274, l='New World', x=297,71, y=77,01, z=222,07]]
Type: Integrated Server (map_client.txt)
Is Modded: Definitely; Client brand changed to 'fml,forge'

This was fixed in Forge 1.9-12.16.0.1803-1.9. Update to the latest version of Forge.