Strange radiation bug

[08:28:15] [Server thread/INFO]: [Crimento: Given [Enriched Uranium] * 1 to Crimento]
[08:28:19] [Server thread/INFO]: Crimento issued server command: /gamemode 0
[08:28:25] [Server thread/ERROR]: Exception caught during firing event cpw.mods.fml.common.gameevent.TickEvent$PlayerTickEvent@4159118b:
java.lang.ArrayIndexOutOfBoundsException: -2
	at gregapi.util.UT$Entities.applyRadioactivity(UT.java:2823) ~[UT$Entities.class:?]
	at gregapi.GT_API_Proxy.onPlayerTickEventServer(GT_API_Proxy.java:369) ~[GT_API_Proxy.class:?]
	at cpw.mods.fml.common.eventhandler.ASMEventHandler_6_GT_API_Proxy_onPlayerTickEventServer_PlayerTickEvent.invoke(.dynamic) ~[?:?]
	at cpw.mods.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:54) ~[ASMEventHandler.class:1.7.10-1614.58]
	at cpw.mods.fml.common.eventhandler.EventBus.post(EventBus.java:140) [EventBus.class:1.7.10-1614.58]
	at cpw.mods.fml.common.FMLCommonHandler.onPlayerPostTick(FMLCommonHandler.java:356) [FMLCommonHandler.class:1.7.10-1614.58]
	at net.minecraft.entity.player.EntityPlayer.func_70071_h_(EntityPlayer.java:380) [yz.class:?]
	at net.minecraft.entity.player.EntityPlayerMP.localOnUpdateEntity(EntityPlayerMP.java:399) [mw.class:?]
	at api.player.server.ServerPlayerAPI.onUpdateEntity(Unknown Source) [ServerPlayerAPI.class:?]
	at net.minecraft.entity.player.EntityPlayerMP.func_71127_g(EntityPlayerMP.java) [mw.class:?]
	at net.minecraft.network.NetHandlerPlayServer.func_147347_a(NetHandlerPlayServer.java:488) [nh.class:?]
	at net.minecraft.network.play.client.C03PacketPlayer.func_148833_a(C03PacketPlayer.java:36) [jd.class:?]
	at net.minecraft.network.play.client.C03PacketPlayer$C04PacketPlayerPosition.func_148833_a(C03PacketPlayer.java:144) [je.class:?]
	at net.minecraft.network.NetworkManager.func_74428_b(NetworkManager.java:245) [ej.class:?]
	at net.minecraft.network.NetworkSystem.func_151269_c(NetworkSystem.java:181) [nc.class:?]
	at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:1023) [MinecraftServer.class:?]
	at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:432) [lt.class:?]
	at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:841) [MinecraftServer.class:?]
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:693) [MinecraftServer.class:?]
	at java.lang.Thread.run(Thread.java:748) [?:1.8.0_141]
[08:28:25] [Server thread/ERROR]: Index: 1 Listeners:
[08:28:25] [Server thread/ERROR]: 0: NORMAL
[08:28:25] [Server thread/ERROR]: 1: ASM: gregapi.GT_API_Proxy_Server@106289fa onPlayerTickEventServer(Lcpw/mods/fml/common/gameevent/TickEvent$PlayerTickEvent;)V
[08:28:25] [Server thread/ERROR]: 2: ASM: codechicken.nei.ServerHandler@8f3fa68 tickEvent(Lcpw/mods/fml/common/gameevent/TickEvent$PlayerTickEvent;)V
[08:28:25] [Server thread/ERROR]: 3: ASM: techguns.events.TechgunsTickHandler@513e96ee onPlayerTick(Lcpw/mods/fml/common/gameevent/TickEvent$PlayerTickEvent;)V
[08:28:25] [Server thread/ERROR]: 4: ASM: appeng.hooks.TickHandler@3f8c999e onTick(Lcpw/mods/fml/common/gameevent/TickEvent;)V
[08:28:25] [Server thread/WARN]: Failed to handle packet for /85.172.60.79:50097
net.minecraft.util.ReportedException: Ticking player
	at net.minecraft.entity.player.EntityPlayerMP.localOnUpdateEntity(EntityPlayerMP.java:477) ~[mw.class:?]
	at api.player.server.ServerPlayerAPI.onUpdateEntity(Unknown Source) ~[ServerPlayerAPI.class:?]
	at net.minecraft.entity.player.EntityPlayerMP.func_71127_g(EntityPlayerMP.java) ~[mw.class:?]
	at net.minecraft.network.NetHandlerPlayServer.func_147347_a(NetHandlerPlayServer.java:488) ~[nh.class:?]
	at net.minecraft.network.play.client.C03PacketPlayer.func_148833_a(C03PacketPlayer.java:36) ~[jd.class:?]
	at net.minecraft.network.play.client.C03PacketPlayer$C04PacketPlayerPosition.func_148833_a(C03PacketPlayer.java:144) ~[je.class:?]
	at net.minecraft.network.NetworkManager.func_74428_b(NetworkManager.java:245) ~[ej.class:?]
	at net.minecraft.network.NetworkSystem.func_151269_c(NetworkSystem.java:181) [nc.class:?]
	at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:1023) [MinecraftServer.class:?]
	at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:432) [lt.class:?]
	at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:841) [MinecraftServer.class:?]
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:693) [MinecraftServer.class:?]
	at java.lang.Thread.run(Thread.java:748) [?:1.8.0_141]
Caused by: java.lang.ArrayIndexOutOfBoundsException: -2
	at gregapi.util.UT$Entities.applyRadioactivity(UT.java:2823) ~[UT$Entities.class:?]
	at gregapi.GT_API_Proxy.onPlayerTickEventServer(GT_API_Proxy.java:369) ~[GT_API_Proxy.class:?]
	at cpw.mods.fml.common.eventhandler.ASMEventHandler_6_GT_API_Proxy_onPlayerTickEventServer_PlayerTickEvent.invoke(.dynamic) ~[?:?]
	at cpw.mods.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:54) ~[ASMEventHandler.class:1.7.10-1614.58]
	at cpw.mods.fml.common.eventhandler.EventBus.post(EventBus.java:140) ~[EventBus.class:1.7.10-1614.58]
	at cpw.mods.fml.common.FMLCommonHandler.onPlayerPostTick(FMLCommonHandler.java:356) ~[FMLCommonHandler.class:1.7.10-1614.58]
	at net.minecraft.entity.player.EntityPlayer.func_70071_h_(EntityPlayer.java:380) ~[yz.class:?]
	at net.minecraft.entity.player.EntityPlayerMP.localOnUpdateEntity(EntityPlayerMP.java:399) ~[mw.class:?]
	... 12 more
[08:28:25] [Server thread/INFO]: Crimento lost connection: Internal server error
[08:28:25] [Server thread/INFO]: Crimento left the game.