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My game crashes whenever I try to make a part for something on my server.

Any clue why??

---- Minecraft Crash Report ----
// My bad.

Time: 4/21/16 8:34 AM
Description: Updating screen events

java.lang.ArrayIndexOutOfBoundsException: -1
at net.minecraft.item.ItemStack.func_77980_a(ItemStack.java:386)
at net.minecraft.inventory.SlotCrafting.func_75208_c(SlotCrafting.java:53)
at net.minecraft.inventory.SlotCrafting.func_82870_a(SlotCrafting.java:110)
at net.minecraft.inventory.Container.func_75144_a(SourceFile:238)
at net.minecraft.client.multiplayer.PlayerControllerMP.func_78753_a(PlayerControllerMP.java:419)
at net.minecraft.client.gui.inventory.GuiContainer.func_146984_a(GuiContainer.java:641)
at net.minecraft.client.gui.inventory.GuiContainer.func_73864_a(GuiContainer.java:394)
at net.minecraft.client.gui.GuiScreen.func_146274_d(GuiScreen.java:296)
at net.minecraft.client.gui.GuiScreen.func_146269_k(GuiScreen.java:268)
at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:1640)
at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:973)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:898)
at net.minecraft.client.main.Main.main(SourceFile:148)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
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 --
Stacktrace:
at net.minecraft.item.ItemStack.func_77980_a(ItemStack.java:386)
at net.minecraft.inventory.SlotCrafting.func_75208_c(SlotCrafting.java:53)
at net.minecraft.inventory.SlotCrafting.func_82870_a(SlotCrafting.java:110)
at net.minecraft.inventory.Container.func_75144_a(SourceFile:238)
at net.minecraft.client.multiplayer.PlayerControllerMP.func_78753_a(PlayerControllerMP.java:419)
at net.minecraft.client.gui.inventory.GuiContainer.func_146984_a(GuiContainer.java:641)
at net.minecraft.client.gui.inventory.GuiContainer.func_73864_a(GuiContainer.java:394)
at net.minecraft.client.gui.GuiScreen.func_146274_d(GuiScreen.java:296)
at net.minecraft.client.gui.GuiScreen.func_146269_k(GuiScreen.java:268)

-- Affected screen --
Details:
Screen name: net.minecraft.client.gui.inventory.GuiCrafting

-- Affected level --
Details:
Level name: MpServer
All players: 1 total; [EntityClientPlayerMP['ChickenCommand'/307, l='MpServer', x=76.11, y=64.62, z=338.28]]
Chunk stats: MultiplayerChunkCache: 439, 439
Level seed: 0
Level generator: ID 00 - default, ver 1. Features enabled: false
Level generator options:
Level spawn location: World: (-12,64,256), Chunk: (at 4,4,0 in -1,16; contains blocks -16,0,256 to -1,255,271), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
Level time: 4636142 game time, 447 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: creative (ID 1). Hardcore: false. Cheats: false
Forced entities: 81 total; [EntityClientPlayerMP['ChickenCommand'/307, l='MpServer', x=76.11, y=64.62, z=338.28], EntityZombie['Zombie'/642, l='MpServer', x=16.50, y=47.00, z=378.50], EntityZombie['Zombie'/643, l='MpServer', x=18.50, y=47.00, z=380.50], EntityBat['Bat'/771, l='MpServer', x=84.34, y=23.03, z=363.53], EntityChicken['Chicken'/133, l='MpServer', x=29.53, y=63.00, z=268.38], EntityBat['Bat'/773, l='MpServer', x=84.47, y=26.52, z=373.88], EntitySkeleton['Skeleton'/135, l='MpServer', x=20.50, y=30.00, z=316.50], EntityCreeper['Creeper'/136, l='MpServer', x=18.50, y=28.00, z=347.50], EntityBat['Bat'/776, l='MpServer', x=84.34, y=27.90, z=376.66], EntityZombie['Zombie'/137, l='MpServer', x=21.50, y=53.00, z=349.50], EntityBat['Bat'/778, l='MpServer', x=57.41, y=28.62, z=410.38], EntityCreeper['Creeper'/148, l='MpServer', x=47.16, y=34.00, z=268.78], EntityBat['Bat'/532, l='MpServer', x=33.11, y=13.95, z=354.36], EntitySlime['Slime'/154, l='MpServer', x=48.22, y=12.00, z=268.22], EntityCreeper['Creeper'/156, l='MpServer', x=62.31, y=62.00, z=337.47], EntityCreeper['Creeper'/167, l='MpServer', x=67.47, y=62.47, z=328.31], EntityBat['Bat'/168, l='MpServer', x=73.25, y=32.10, z=343.56], EntityBat['Bat'/169, l='MpServer', x=73.25, y=32.10, z=343.25], EntityBat['Bat'/171, l='MpServer', x=73.25, y=32.10, z=343.41], EntityBat['Bat'/172, l='MpServer', x=73.50, y=32.10, z=344.13], EntityItem['item.item.rottenFlesh'/300, l='MpServer', x=43.59, y=64.13, z=321.72], EntityBat['Bat'/173, l='MpServer', x=75.25, y=33.10, z=347.25], EntityCreeper['Creeper'/175, l='MpServer', x=66.00, y=62.26, z=335.75], EntityCreeper['Creeper'/176, l='MpServer', x=74.13, y=62.00, z=347.84], EntityItem['item.item.rottenFlesh'/304, l='MpServer', x=86.44, y=63.13, z=294.47], EntitySkeleton['Skeleton'/308, l='MpServer', x=79.25, y=11.00, z=385.78], EntitySkeleton['Skeleton'/180, l='MpServer', x=77.50, y=39.00, z=358.50], EntitySpider['Spider'/309, l='MpServer', x=74.72, y=14.00, z=393.00], EntityCreeper['Creeper'/310, l='MpServer', x=122.56, y=64.00, z=358.94], EntityCreeper['Creeper'/311, l='MpServer', x=113.84, y=62.04, z=314.22], EntityChicken['Chicken'/312, l='MpServer', x=126.53, y=64.00, z=369.53], EntitySpider['Spider'/313, l='MpServer', x=116.72, y=63.00, z=373.44], EntitySkeleton['Skeleton'/185, l='MpServer', x=89.50, y=61.12, z=296.78], EntityBat['Bat'/314, l='MpServer', x=110.88, y=19.52, z=387.25], EntityChicken['Chicken'/316, l='MpServer', x=130.97, y=64.00, z=366.97], EntitySkeleton['Skeleton'/828, l='MpServer', x=60.50, y=31.00, z=375.50], EntityChicken['Chicken'/317, l='MpServer', x=143.59, y=65.00, z=361.59], EntityCreeper['Creeper'/829, l='MpServer', x=61.50, y=31.00, z=376.50], EntityCreeper['Creeper'/318, l='MpServer', x=126.63, y=64.00, z=360.00], EntityCreeper['Creeper'/190, l='MpServer', x=93.50, y=45.00, z=329.50], EntityCreeper['Creeper'/191, l='MpServer', x=85.50, y=39.00, z=347.50], EntityItem['item.item.bone'/320, l='MpServer', x=122.59, y=63.13, z=399.94], EntityCreeper['Creeper'/192, l='MpServer', x=88.00, y=39.00, z=351.41], EntityWitch['Witch'/193, l='MpServer', x=85.16, y=44.00, z=351.50], EntityChicken['Chicken'/322, l='MpServer', x=141.53, y=65.00, z=381.53], EntityCreeper['Creeper'/194, l='MpServer', x=83.50, y=39.00, z=351.50], EntitySkeleton['Skeleton'/323, l='MpServer', x=106.25, y=62.22, z=409.78], EntitySkeleton['Skeleton'/195, l='MpServer', x=80.50, y=39.00, z=354.50], EntityChicken['Chicken'/324, l='MpServer', x=138.34, y=64.00, z=393.56], EntitySkeleton['Skeleton'/196, l='MpServer', x=80.34, y=44.00, z=362.69], EntityZombie['Zombie'/197, l='MpServer', x=86.56, y=45.00, z=354.50], EntityCreeper['Creeper'/198, l='MpServer', x=82.50, y=44.00, z=360.50], EntityZombie['Zombie'/199, l='MpServer', x=81.50, y=44.00, z=354.50], EntityChicken['Chicken'/328, l='MpServer', x=150.59, y=65.00, z=356.56], EntitySkeleton['Skeleton'/200, l='MpServer', x=83.50, y=44.00, z=358.50], EntityZombie['Zombie'/201, l='MpServer', x=83.50, y=44.00, z=352.50], EntityZombie['Zombie'/202, l='MpServer', x=80.56, y=45.00, z=355.97], EntityChicken['Chicken'/333, l='MpServer', x=150.47, y=66.00, z=369.59], EntityZombie['Zombie'/591, l='MpServer', x=1.50, y=28.00, z=305.50], EntitySkeleton['Skeleton'/336, l='MpServer', x=119.13, y=63.00, z=262.31], EntityZombie['Zombie'/596, l='MpServer', x=45.50, y=30.00, z=384.50], EntityZombie['Zombie'/597, l='MpServer', x=43.50, y=30.00, z=385.50], EntityBat['Bat'/853, l='MpServer', x=7.75, y=33.00, z=312.47], EntitySkeleton['Skeleton'/214, l='MpServer', x=96.50, y=45.00, z=330.50], EntityZombie['Zombie'/598, l='MpServer', x=44.53, y=30.35, z=385.40], EntitySkeleton['Skeleton'/215, l='MpServer', x=110.63, y=61.52, z=374.09], EntityChicken['Chicken'/599, l='MpServer', x=44.50, y=30.00, z=385.50], EntityCreeper['Creeper'/347, l='MpServer', x=146.97, y=64.00, z=404.38], EntityCow['Cow'/102, l='MpServer', x=-2.22, y=64.00, z=284.28], EntityCow['Cow'/103, l='MpServer', x=-2.25, y=68.00, z=292.84], EntityCreeper['Creeper'/494, l='MpServer', x=5.50, y=32.00, z=313.50], EntityChicken['Chicken'/110, l='MpServer', x=-2.59, y=73.00, z=364.44], EntityCreeper['Creeper'/495, l='MpServer', x=3.50, y=32.00, z=320.50], EntitySkeleton['Skeleton'/496, l='MpServer', x=11.50, y=32.00, z=310.50], EntityCreeper['Creeper'/629, l='MpServer', x=94.50, y=24.00, z=341.50], EntityCow['Cow'/120, l='MpServer', x=2.28, y=64.00, z=269.50], EntityCow['Cow'/121, l='MpServer', x=7.47, y=64.00, z=283.69], EntitySpider['Spider'/508, l='MpServer', x=72.59, y=63.00, z=275.81], EntitySkeleton['Skeleton'/125, l='MpServer', x=16.84, y=69.00, z=346.53], EntitySpider['Spider'/509, l='MpServer', x=79.81, y=63.00, z=276.25], EntityChicken['Chicken'/126, l='MpServer', x=3.41, y=72.00, z=375.59]]
Retry entities: 0 total; []
Server brand: fml,forge
Server type: Non-integrated multiplayer server
Stacktrace:
at net.minecraft.client.multiplayer.WorldClient.func_72914_a(WorldClient.java:373)
at net.minecraft.client.Minecraft.func_71396_d(Minecraft.java:2444)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:919)
at net.minecraft.client.main.Main.main(SourceFile:148)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

-- System Details --
Details:
Minecraft Version: 1.7.10
Operating System: Windows 7 (amd64) version 6.1
Java Version: 1.8.0_25, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 216287288 bytes (206 MB) / 399364096 bytes (380 MB) up to 1060372480 bytes (1011 MB)
JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
FML: MCP v9.05 FML v7.10.99.99 Minecraft Forge 10.13.4.1614 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
UCHIJA mcp{9.05} [Minecraft Coder Pack] (minecraft.jar)
UCHIJA FML{7.10.99.99} [Forge Mod Loader] (forge-1.7.10-10.13.4.1614-1.7.10.jar)
UCHIJA Forge{10.13.4.1614} [Minecraft Forge] (forge-1.7.10-10.13.4.1614-1.7.10.jar)
UCHIJA flansmod{4.10.0} [Flan's Mod] (Flans Mod-1.7.10-4.10.0.jar)
GL info: ' Vendor: 'ATI Technologies Inc.' Version: '4.2.12224 Compatibility Profile Context 12.105.4.7000' Renderer: 'AMD Radeon HD 7560D'
Launched Version: 1.7.10-Forge10.13.4.1614-1.7.10
LWJGL: 2.9.1
OpenGL: AMD Radeon HD 7560D GL version 4.2.12224 Compatibility Profile Context 12.105.4.7000, ATI Technologies Inc.
GL Caps: Using GL 1.3 multitexturing.
Using framebuffer objects because OpenGL 3.0 is supported and separate blending is supported.
Anisotropic filtering is supported and maximum anisotropy is 16.
Shaders are available because OpenGL 2.1 is supported.

Is Modded: Definitely; Client brand changed to 'fml,forge'
Type: Client (map_client.txt)
Resource Packs: []
Current Language: English (UK)
Profiler Position: N/A (disabled)
Vec3 Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
Anisotropic Filtering: Off (1)