Bug on GUI/Blocks

I create a block with inv, I enable the open GUI on brake since right click on block is broken, nope it crashs out

---- Minecraft Crash Report ----
// Surprise! Haha. Well, this is awkward.

Time: 4/26/17 9:16 PM
Description: Ticking player

java.lang.ArrayIndexOutOfBoundsException: 18
	at java.util.Arrays$ArrayList.get(Arrays.java:3841)
	at net.minecraft.util.NonNullList.get(SourceFile:40)
	at net.minecraft.tileentity.TileEntityLockableLoot.getStackInSlot(SourceFile:90)
	at net.minecraft.inventory.Slot.getStack(Slot.java:60)
	at net.minecraft.inventory.Container.detectAndSendChanges(Container.java:75)
	at net.minecraft.entity.player.EntityPlayerMP.onUpdate(EntityPlayerMP.java:280)
	at net.minecraft.world.World.updateEntityWithOptionalForce(World.java:1961)
	at net.minecraft.world.WorldServer.updateEntityWithOptionalForce(WorldServer.java:840)
	at net.minecraft.world.World.updateEntity(World.java:1931)
	at net.minecraft.world.WorldServer.tickPlayers(WorldServer.java:650)
	at net.minecraft.world.World.updateEntities(World.java:1723)
	at net.minecraft.world.WorldServer.updateEntities(WorldServer.java:621)
	at net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:720)
	at net.minecraft.server.MinecraftServer.tick(MinecraftServer.java:624)
	at net.minecraft.server.integrated.IntegratedServer.tick(IntegratedServer.java:149)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:482)
	at java.lang.Thread.run(Thread.java:745)


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

-- Head --
Thread: Server thread
Stacktrace:
	at java.util.Arrays$ArrayList.get(Arrays.java:3841)
	at net.minecraft.util.NonNullList.get(SourceFile:40)
	at net.minecraft.tileentity.TileEntityLockableLoot.getStackInSlot(SourceFile:90)
	at net.minecraft.inventory.Slot.getStack(Slot.java:60)
	at net.minecraft.inventory.Container.detectAndSendChanges(Container.java:75)
	at net.minecraft.entity.player.EntityPlayerMP.onUpdate(EntityPlayerMP.java:280)
	at net.minecraft.world.World.updateEntityWithOptionalForce(World.java:1961)
	at net.minecraft.world.WorldServer.updateEntityWithOptionalForce(WorldServer.java:840)
	at net.minecraft.world.World.updateEntity(World.java:1931)

-- Player being ticked --
Details:
	Entity Type: null (net.minecraft.entity.player.EntityPlayerMP)
	Entity ID: 355
	Entity Name: Player949
	Entity's Exact location: 16.08, 71.00, 279.95
	Entity's Block location: World: (16,71,279), Chunk: (at 0,4,7 in 1,17; contains blocks 16,0,272 to 31,255,287), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
	Entity's Momentum: 0.00, -0.08, 0.00
	Entity's Passengers: []
	Entity's Vehicle: ~~ERROR~~ NullPointerException: null
Stacktrace:
	at net.minecraft.world.WorldServer.tickPlayers(WorldServer.java:650)
	at net.minecraft.world.World.updateEntities(World.java:1723)
	at net.minecraft.world.WorldServer.updateEntities(WorldServer.java:621)

-- Affected level --
Details:
	Level name: New World
	All players: 1 total; [EntityPlayerMP['Player949'/355, l='New World', x=16.08, y=71.00, z=279.95]]
	Chunk stats: ServerChunkCache: 283 Drop: 0
	Level seed: -8158217876579552783
	Level generator: ID 00 - default, ver 1. Features enabled: true
	Level generator options: 
	Level spawn location: World: (-12,64,252), Chunk: (at 4,4,12 in -1,15; contains blocks -16,0,240 to -1,255,255), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
	Level time: 1963 game time, 1963 day time
	Level dimension: 0
	Level storage version: 0x04ABD - Anvil
	Level weather: Rain time: 77359 (now: false), thunder time: 132573 (now: false)
	Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: true
Stacktrace:
	at net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:720)
	at net.minecraft.server.MinecraftServer.tick(MinecraftServer.java:624)
	at net.minecraft.server.integrated.IntegratedServer.tick(IntegratedServer.java:149)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:482)
	at java.lang.Thread.run(Thread.java:745)

-- System Details --
Details:
	Minecraft Version: 1.11.2
	Operating System: Windows 10 (amd64) version 10.0
	Java Version: 1.8.0_101, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 951784560 bytes (907 MB) / 1418723328 bytes (1353 MB) up to 3797417984 bytes (3621 MB)
	JVM Flags: 0 total; 
	IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
	FML: MCP 9.38 Powered by Forge 13.20.0.2228 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] (forgeBin-1.11.2-13.20.0.2228.jar) 
	UCHIJAAAA	forge{13.20.0.2228} [Minecraft Forge] (forgeBin-1.11.2-13.20.0.2228.jar) 
	UCHIJAAAA	testenvironmentmod{1.0} [testenvironmentmod] (modid-1.0.jar) 
	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['Player949'/355, l='New World', x=16.08, y=71.00, z=279.95]]
	Type: Integrated Server (map_client.txt)
	Is Modded: Definitely; Client brand changed to 'fml,forge'