crash report:

---- Minecraft Crash Report ----
// Ouch. That hurt :(

Time: 1/11/17 4:27 PM
Description: Updating screen events

java.lang.NullPointerException: The validated object is null
at org.apache.commons.lang3.Validate.notNull(Validate.java:222)
at org.apache.commons.lang3.Validate.notNull(Validate.java:203)
at net.minecraft.util.NonNullList.set(SourceFile:45)
at net.minecraft.entity.player.InventoryPlayer.func_70299_a(InventoryPlayer.java:513)
at net.minecraft.inventory.Slot.func_75215_d(Slot.java:70)
at com.mrcrayfish.furniture.gui.containers.ContainerEski.func_82846_b(ContainerEski.java:93)
at net.minecraft.inventory.Container.func_184996_a(Container.java:237)
at net.minecraft.client.multiplayer.PlayerControllerMP.func_187098_a(PlayerControllerMP.java:550)
at net.minecraft.client.gui.inventory.GuiContainer.func_184098_a(GuiContainer.java:632)
at net.minecraft.client.gui.inventory.GuiContainer.func_73864_a(GuiContainer.java:391)
at net.minecraft.client.gui.GuiScreen.func_146274_d(GuiScreen.java:542)
at net.minecraft.client.gui.GuiScreen.func_146269_k(GuiScreen.java:510)
at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:1695)
at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:1056)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:372)
at net.minecraft.client.main.Main.main(SourceFile:124)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

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

-- Head --
Thread: Client thread
Stacktrace:
at org.apache.commons.lang3.Validate.notNull(Validate.java:222)
at org.apache.commons.lang3.Validate.notNull(Validate.java:203)
at net.minecraft.util.NonNullList.set(SourceFile:45)
at net.minecraft.entity.player.InventoryPlayer.func_70299_a(InventoryPlayer.java:513)
at net.minecraft.inventory.Slot.func_75215_d(Slot.java:70)
at com.mrcrayfish.furniture.gui.containers.ContainerEski.func_82846_b(ContainerEski.java:93)
at net.minecraft.inventory.Container.func_184996_a(Container.java:237)
at net.minecraft.client.multiplayer.PlayerControllerMP.func_187098_a(PlayerControllerMP.java:550)
at net.minecraft.client.gui.inventory.GuiContainer.func_184098_a(GuiContainer.java:632)
at net.minecraft.client.gui.inventory.GuiContainer.func_73864_a(GuiContainer.java:391)
at net.minecraft.client.gui.GuiScreen.func_146274_d(GuiScreen.java:542)
at net.minecraft.client.gui.GuiScreen.func_146269_k(GuiScreen.java:510)

-- Affected screen --
Details:
Screen name: com.mrcrayfish.furniture.gui.GuiEski

-- Affected level --
Details:
Level name: MpServer
All players: 1 total; [EntityPlayerSP['ItSureStingz'/246, l='MpServer', x=-53.85, y=103.00, z=239.28]]
Chunk stats: MultiplayerChunkCache: 225, 225
Level seed: 0
Level generator: ID 00 - default, ver 1. Features enabled: false
Level generator options:
Level spawn location: World: (40,64,227), Chunk: (at 8,4,3 in 2,14; contains blocks 32,0,224 to 47,255,239), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Level time: 2939742 game time, 49711 day time
Level dimension: 0
Level storage version: 0x00000 - Unknown?
Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false)
Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
Forced entities: 49 total; [EntityZombie['Zombie'/128, l='MpServer', x=-37.50, y=28.00, z=278.50], EntityZombie['Zombie'/129, l='MpServer', x=-32.50, y=28.00, z=272.50], EntityCreeper['Creeper'/130, l='MpServer', x=-34.06, y=26.00, z=279.46], EntitySkeleton['Skeleton'/131, l='MpServer', x=-33.50, y=25.00, z=308.50], EntitySheep['Sheep'/134, l='MpServer', x=-19.67, y=71.00, z=171.76], EntityPlayerSP['ItSureStingz'/246, l='MpServer', x=-53.85, y=103.00, z=239.28], EntityCreeper['Creeper'/135, l='MpServer', x=-31.50, y=25.00, z=276.50], EntityCreeper['Creeper'/136, l='MpServer', x=-18.30, y=44.00, z=315.60], EntityBat['Bat'/143, l='MpServer', x=-11.57, y=36.58, z=159.57], EntitySkeleton['Skeleton'/144, l='MpServer', x=-2.50, y=16.00, z=245.50], EntitySkeleton['Skeleton'/145, l='MpServer', x=-15.30, y=44.00, z=313.49], EntityCreeper['Creeper'/146, l='MpServer', x=-16.00, y=44.00, z=313.47], EntityCreeper['Creeper'/147, l='MpServer', x=-14.50, y=55.00, z=315.50], EntityCreeper['Creeper'/150, l='MpServer', x=13.50, y=44.00, z=317.50], EntityChicken['Chicken'/40, l='MpServer', x=-129.82, y=84.00, z=231.12], EntityChicken['Chicken'/41, l='MpServer', x=-131.00, y=83.00, z=231.58], EntityCreeper['Creeper'/44, l='MpServer', x=-128.17, y=39.00, z=292.50], EntityPig['Pig'/47, l='MpServer', x=-124.67, y=93.00, z=177.50], EntityChicken['Chicken'/48, l='MpServer', x=-127.35, y=85.00, z=238.19], EntitySkeleton['Skeleton'/51, l='MpServer', x=-122.50, y=52.00, z=250.50], EntitySquid['Squid'/52, l='MpServer', x=-113.24, y=49.67, z=256.34], EntitySkeleton['Skeleton'/53, l='MpServer', x=-119.50, y=23.00, z=283.50], EntityZombie['Zombie'/58, l='MpServer', x=-100.28, y=12.00, z=237.54], EntitySquid['Squid'/59, l='MpServer', x=-109.69, y=49.45, z=252.48], EntitySquid['Squid'/60, l='MpServer', x=-107.40, y=48.00, z=259.60], EntitySquid['Squid'/61, l='MpServer', x=-107.40, y=49.24, z=258.87], EntityBat['Bat'/62, l='MpServer', x=-111.25, y=37.00, z=289.96], EntityVillager['Villager'/73, l='MpServer', x=-88.74, y=77.56, z=234.90], EntityVillager['Villager'/74, l='MpServer', x=-88.26, y=78.00, z=235.71], EntityVillager['Villager'/75, l='MpServer', x=-88.30, y=77.00, z=234.28], EntityItem['item.item.rottenFlesh'/76, l='MpServer', x=-93.32, y=77.00, z=235.88], EntityChicken['Chicken'/96, l='MpServer', x=-66.50, y=76.31, z=238.50], EntityChicken['Chicken'/97, l='MpServer', x=-66.80, y=75.00, z=239.80], EntityChicken['Chicken'/98, l='MpServer', x=-66.80, y=75.00, z=239.80], EntityVillager['Villager'/99, l='MpServer', x=-65.70, y=77.00, z=239.07], EntityItem['item.item.egg'/100, l='MpServer', x=-66.88, y=75.00, z=239.88], EntityItem['item.item.egg'/107, l='MpServer', x=-63.76, y=75.00, z=214.70], EntityChicken['Chicken'/108, l='MpServer', x=-58.85, y=75.00, z=210.81], EntityChicken['Chicken'/109, l='MpServer', x=-55.50, y=74.00, z=239.12], EntityZombie['Zombie'/110, l='MpServer', x=-59.69, y=28.00, z=248.43], EntityZombie['Zombie'/111, l='MpServer', x=-62.50, y=28.00, z=245.50], EntityZombie['Zombie'/112, l='MpServer', x=-60.50, y=28.00, z=247.50], EntityZombie['Zombie'/113, l='MpServer', x=-62.50, y=28.00, z=247.50], EntityPig['Pig'/114, l='MpServer', x=-61.72, y=88.00, z=271.50], EntityPig['Pig'/115, l='MpServer', x=-56.53, y=94.02, z=255.36], EntityEnderman['Enderman'/116, l='MpServer', x=-57.50, y=38.00, z=308.50], EntityCreeper['Creeper'/124, l='MpServer', x=-38.50, y=29.00, z=170.50], EntitySkeleton['Skeleton'/125, l='MpServer', x=-33.50, y=33.00, z=160.50], EntityCow['Cow'/127, l='MpServer', x=-47.50, y=78.00, z=260.80]]
Retry entities: 0 total; []
Server brand: fml,forge
Server type: Integrated singleplayer server
Stacktrace:
at net.minecraft.client.multiplayer.WorldClient.func_72914_a(WorldClient.java:415)
at net.minecraft.client.Minecraft.func_71396_d(Minecraft.java:2655)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:393)
at net.minecraft.client.main.Main.main(SourceFile:124)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

-- System Details --
Details:
Minecraft Version: 1.11.2
Operating System: Windows 10 (x86) version 10.0
Java Version: 1.8.0_111, Oracle Corporation
Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
Memory: 88820504 bytes (84 MB) / 523501568 bytes (499 MB) up to 523501568 bytes (499 MB)
JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx512M -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
IntCache: cache: 1, tcache: 1, allocated: 12, tallocated: 94
FML: MCP 9.38 Powered by Forge 13.20.0.2206 5 mods loaded, 5 mods active
States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored
UCHIJAAAA minecraft{1.11.2} [Minecraft] (minecraft.jar)
UCHIJAAAA mcp{9.19} [Minecraft Coder Pack] (minecraft.jar)
UCHIJAAAA FML{8.0.99.99} [Forge Mod Loader] (forge-1.11.2-13.20.0.2206.jar)
UCHIJAAAA forge{13.20.0.2206} [Minecraft Forge] (forge-1.11.2-13.20.0.2206.jar)
UCHIJAAAA cfm{4.1.1} [MrCrayfish's Furniture Mod] (cfm-4.1.1-mc1.11.2.jar)
Loaded coremods (and transformers):
GL info: ' Vendor: 'Intel' Version: '4.3.0 - Build 20.19.15.4531' Renderer: 'Intel(R) HD Graphics 4400'
Launched Version: 1.11.2-forge1.11.2-13.20.0.2206
LWJGL: 2.9.4
OpenGL: Intel(R) HD Graphics 4400 GL version 4.3.0 - Build 20.19.15.4531, Intel
GL Caps: Using GL 1.3 multitexturing.
Using GL 1.3 texture combiners.
Using framebuffer objects because OpenGL 3.0 is supported and separate blending is supported.
Shaders are available because OpenGL 2.1 is supported.
VBOs are available because OpenGL 1.5 is supported.

Using VBOs: Yes
Is Modded: Definitely; Client brand changed to 'fml,forge'
Type: Client (map_client.txt)
Resource Packs: 
Current Language: English (US)
Profiler Position: N/A (disabled)
CPU: 4x Intel(R) Core(TM) i3-4030U CPU @ 1.90GHz

Please use Pastebin next time

Fixed in 1.12.2