When you try right clicking the tool forge after emptying the spoils bag:

2014-06-15 20:52:04 [SEVERE] [Minecraft-Client] ########## GL ERROR ##########
2014-06-15 20:52:04 [SEVERE] [Minecraft-Client] @ Post render
2014-06-15 20:52:04 [SEVERE] [Minecraft-Client] 1283: Stack overflow
2014-06-15 20:52:11 [SEVERE] [Minecraft-Client] ########## GL ERROR ##########
2014-06-15 20:52:11 [SEVERE] [Minecraft-Client] @ Post render
2014-06-15 20:52:11 [SEVERE] [Minecraft-Client] 1283: Stack overflow
2014-06-15 20:53:37 [INFO] [Minecraft-Server] Stopping server
2014-06-15 20:53:37 [INFO] [Minecraft-Server] Saving players
2014-06-15 20:53:37 [INFO] [STDOUT] Unloading Player: HotCakePan
2014-06-15 20:53:37 [INFO] [Minecraft-Server] Saving worlds
2014-06-15 20:53:37 [INFO] [Minecraft-Server] Saving chunks for level 'Bug recreation'/Overworld
2014-06-15 20:53:37 [INFO] [Minecraft-Server] Saving chunks for level 'Bug recreation'/Nether
2014-06-15 20:53:37 [INFO] [ForgeModLoader] [Thaumcraft] Removed 19 aura nodes when world 0 unloaded.
2014-06-15 20:53:37 [INFO] [ForgeModLoader] [Thaumcraft] Removed 0 aura nodes when world -1 unloaded.
2014-06-15 20:53:37 [INFO] [ForgeModLoader] Unloading dimension 0
2014-06-15 20:53:37 [INFO] [ForgeModLoader] Unloading dimension -1
2014-06-15 20:53:38 [INFO] [STDERR] net.minecraft.util.ReportedException: Exception in world tick
2014-06-15 20:53:38 [INFO] [STDERR] 	at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:1878)
2014-06-15 20:53:38 [INFO] [STDERR] 	at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:835)
2014-06-15 20:53:38 [INFO] [STDERR] 	at net.minecraft.client.Minecraft.run(Minecraft.java:760)
2014-06-15 20:53:38 [INFO] [STDERR] 	at java.lang.Thread.run(Unknown Source)
2014-06-15 20:53:38 [INFO] [STDERR] Caused by: java.lang.NullPointerException
2014-06-15 20:53:38 [INFO] [STDERR] 	at mods.tinker.tconstruct.blocks.logic.ToolForgeLogic.buildTool(ToolForgeLogic.java:48)
2014-06-15 20:53:38 [INFO] [STDERR] 	at mods.tinker.tconstruct.blocks.logic.ToolStationLogic.func_70296_d(ToolStationLogic.java:60)
2014-06-15 20:53:38 [INFO] [STDERR] 	at net.minecraft.inventory.Slot.func_75218_e(Slot.java:113)
2014-06-15 20:53:38 [INFO] [STDERR] 	at net.minecraft.inventory.Slot.func_75215_d(Slot.java:105)
2014-06-15 20:53:38 [INFO] [STDERR] 	at net.minecraft.inventory.Container.func_75131_a(SourceFile:389)
2014-06-15 20:53:38 [INFO] [STDERR] 	at net.minecraft.client.multiplayer.NetClientHandler.func_72486_a(NetClientHandler.java:1227)
2014-06-15 20:53:38 [INFO] [STDERR] 	at net.minecraft.network.packet.Packet104WindowItems.func_73279_a(SourceFile:45)
2014-06-15 20:53:38 [INFO] [STDERR] 	at net.minecraft.network.MemoryConnection.func_74428_b(MemoryConnection.java:89)
2014-06-15 20:53:38 [INFO] [STDERR] 	at net.minecraft.client.multiplayer.NetClientHandler.func_72551_d(NetClientHandler.java:266)
2014-06-15 20:53:38 [INFO] [STDERR] 	at net.minecraft.client.multiplayer.WorldClient.func_72835_b(WorldClient.java:94)
2014-06-15 20:53:38 [INFO] [STDERR] 	at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:1862)
2014-06-15 20:53:38 [INFO] [STDERR] 	... 3 more
2014-06-15 20:53:48 [INFO] [Minecraft-Client] Stopping!
2014-06-15 20:53:48 [INFO] [STDOUT]
2014-06-15 20:53:48 [INFO] [STDOUT] SoundSystem shutting down...
2014-06-15 20:53:49 [INFO] [STDOUT]     Author: Paul Lamb, www.paulscode.com
2014-06-15 20:53:49 [INFO] [STDOUT]