I tried disabling StatusEffectHUD form pack and now the error is in minecraft core.
I can see someone else reported same error but their circumstances leading up to it are not known.java.lang.NullPointerException
at net.minecraft.potion.PotionEffect.func_76455_a(PotionEffect.java:186)
at net.minecraft.entity.EntityLivingBase.func_70679_bo(EntityLivingBase.java:605)
at net.minecraft.entity.EntityLivingBase.func_70030_z(EntityLivingBase.java:362)
at net.minecraft.entity.Entity.func_70071_h_(Entity.java:438)
at net.minecraft.entity.EntityLivingBase.func_70071_h_(EntityLivingBase.java:1781)
at net.minecraft.entity.player.EntityPlayer.func_70071_h_(EntityPlayer.java:342)
at net.minecraft.client.entity.EntityClientPlayerMP.func_70071_h_(SourceFile:46)
at net.minecraft.world.World.func_72866_a(World.java:2350)
at net.minecraft.world.World.func_72870_g(World.java:2311)
at net.minecraft.world.World.func_72939_s(World.java:2157)
at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:1921)
at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:910)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:838)
at net.minecraft.client.main.Main.main(SourceFile:101)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:131)
at net.minecraft.launchwrapper.Launch.main(Launch.java:27)
http://support.feed-the-beast.com/questions/9935/nullpointerexception-potioneffect
I reproduced issue in SP.
I set up a fight with a Trent.
After many hits I had no status effects on me. Not conclusive as I don't fight Trents often (this was the first one I'd seen in game)
then I blocked with my shadow steel sword and I saw the block animation. Did not see or hear any hit on me but client crash.
Now that SP world crashes on joining.
So I assume I can delete player data to get the SP world working but ouch
Edit:
Can not work out how to restore SP world once this happens. Deleted player data and still happens.
I tested vs various mobs and so far it's only Trent that it happens. Not related to blocking with sword. It's something that happens when hit - pretty sure it's a status effect.
I will try 1.12 as all previous tests were 1,.11. This is not a Blood N Bones issue I know but sometimes the best ideas come from the most active and inspired modpack. if nothing else - the posts might help someone else eventually.
DO NOT FIGHT Trents!
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