changing mechanical user click options causes server crash minecraft 1.12.2

[Scootz42]

hello, i've been experiencing an issue when trying to change the type of right clicking the mechanical user tries to do. seems like as soon as i try to change it from generic click type it causes my server to crash
running forge version 14.23.2.2645 on my own custom pack ... SchevityCraft. i've used the mechanical user many times in the past without any issue so not sure why its causing a crash all of a sudden
crash-2018-04-16_14.11.58-server.txt

[droped]

Could you try using a mechanical user without ftb utilities and ftb lib?

[WilliamBlaze]

i had a very similar crash caused from merely shift clicking on a wireless battery from extra Utilities 2
i was checking how much i had stored when the crash happened.

---- Minecraft Crash Report -------- Minecraft Crash Report ----
WARNING: coremods are present: MalisisSwitchesPlugin (malisisswitches-1.12.2-5.1.0.jar) PistonExpansionLoadingPlugin (pistonexpansion-1.12.2-1.0.1-core.jar) CTMCorePlugin (CTM-MC1.12-0.2.3.12.jar) Do not report to Forge! Remove FoamFixAPI (or replace with FoamFixAPI-Lawful) and try again. (FoamFix-1.12.2-0.9.4-Anarchy.jar) Techguns Core (techguns-1.12.2-2.0.1.1.jar) NWRTweak (redstonepaste-mc1.12-1.7.5.jar) LibrarianLib Plugin (librarianlib-1.12.2-4.8.jar) HammerCoreCore (HammerCore-1.12.2-1.9.9.4.jar) MalisisCorePlugin (malisiscore-1.12.2-6.4.0.jar) ShetiPhian-ASM (shetiphiancore-1.12.0-3.5.6.jar) Inventory Tweaks Coremod (InventoryTweaks-1.63.jar) Wizardry Plugin (wizardry-0.8.5.jar) SHLoadingPlugin (ScalingHealth-1.12-1.3.12-93.jar) Born in a Barn (Born+In+A+Barn+V1.8-1.12-1.0.jar) ForgelinPlugin (Forgelin-1.6.0.jar) SSLoadingPlugin (SereneSeasons-1.12.2-1.1.5-universal.jar) AppleCore (AppleCore-mc1.12.2-3.1.1.jar) MovingWorldCore (movingworld-1.12-6.342-full.jar) LoadingPlugin (Quark-r1.4-122.jar) IELoadingPlugin (ImmersiveEngineering-0.12-80-core.jar)Contact their authors BEFORE contacting forge
// Quite honestly, I wouldn't worry myself about that.
Time: 4/30/18 4:49 AMDescription: Exception in server tick loop
java.util.ConcurrentModificationException at gnu.trove.impl.hash.THashPrimitiveIterator.nextIndex(THashPrimitiveIterator.java:83) at gnu.trove.impl.hash.THashPrimitiveIterator.hasNext(THashPrimitiveIterator.java:102) at com.rwtema.extrautils2.power.PowerManager.tick(PowerManager.java:446) at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_2542_PowerManager_tick_ServerTickEvent.invoke(.dynamic) at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:90) at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:182) at net.minecraftforge.fml.common.FMLCommonHandler.onPostServerTick(FMLCommonHandler.java:265) at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:710) at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:252) at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:524) at java.lang.Thread.run(Thread.java:745).

and i'm not even using FTB lib or FTB util. just saying.

[droped]

@WilliamBlaze That's a completely different crash. Open a new issue.

[droped]

@Scootz42 I've found a fix. In your ftb team settings, disable (or set to none) anything related to fake players or other players.