Minecraft version: 1.12.2
Wizardry version: 4.2.1
Environment: Singleplayer

java.lang.ArrayIndexOutOfBoundsException
Any casted spell causes minecraft to crash. Crash itself is being avoided when there's Vanilla Fix installed, therefore minecraft just freezes for a moment. Some spells cause to involve Random Things into crashlog.

Other mods involved: Random Things, Vanilla Fix

Link to crash report: [→1←], [→2←]

Looks like something to do with the spells sound category. Could you list any mods you have installed which do something to the sounds? Thanks.

I am having a similar issue, but during my troubleshooting I found a even stranger one.
After getting this crash:

java.util.concurrent.ExecutionException: java.lang.ArrayIndexOutOfBoundsException
at java.util.concurrent.FutureTask.report(FutureTask.java:122)
at java.util.concurrent.FutureTask.get(FutureTask.java:192)
at net.minecraft.util.Util.runTask(SourceFile:531)
at net.minecraft.client.Minecraft.runGameLoop(Minecraft.java:1088)
at net.minecraft.client.Minecraft.run(Minecraft.java:3942)
at net.minecraft.client.main.Main.main(SourceFile:123)
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:497)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
Caused by: java.lang.ArrayIndexOutOfBoundsException

I suspected that a mod called Dynamic Surroundings which affects sounds were involved. Muting individual sounds via that mod did nothing, but when I pressed the "Music and sounds" option in the pause menu just to test if muting the game would do anything, suddenly the game crashed to the main menu and I got this crash:

java.lang.ArrayIndexOutOfBoundsException

-- Affected screen --
Screen name: org.orecruncher.dsurround.client.gui.GuiScreenOptionsSoundReplace

So yeah, I think dynamic surroundings might be involved. Warrock do you have that mod installed?

I think the involvement of Random Things is probably a coincidence, it doesn't seem to be related to the crash itself.

I think whatever causes you to be unable to adjust sound values also removes the effect sounds from spells.

I suspect the issue is a conflict between how dynamic surroundings adds its sound categories and how wizardry adds its one. Strangely though, I actually have dynamic surroundings installed myself and it's running fine alongside wizardry.

Could you try going into your options.txt and pasting the lines that start with soundCategory here?

I have noticed the same issue, but I do not have Dynamic Surroundings, but I do have Random Things installed.
Edit: Crash Report
Full Log

Interesting, Random Things does not add any sound categories as far as I can tell. Could you post your crash report? It may not be the same issue at all.

I can tell from the crash reports that Warrock does have dynamic surroundings.

Just added it to the above post.
Edit: The crash report doesn't mention Random Things, but the full log does.
I also just noticed that the full log has two reports in it, one mentions Random Things, the other doesn't.

I'll post the lines from options.txt when I get back to my computer, but just wanted to mention that I too have random things installed, and an earlier crash from the version before this one mentioned that mod when it crashed as I punched the lightning hammer. I did test that with the current version and could not recreate it.

Here's some new crash reports. This one is when i tried to shift-rightclick Greater Telekinesis Scroll on chest. The second is chained from previous crash. Then endless crash loop in main menu (thanks to vanilla fix)...

Btw, talking of sounds, Random Things has sound muffling mechanics. Sound Dampeners and such.

I did some more testing, removing random things changed nothing, same crashes, but when I removed dynamic surroundings and kept random things I did actually still crash. https://gist.github.com/BeardStroker/e56e3fb7683213fb4ba5b83e389dc998

And it also still crashes when pressing the music and sounds option button.
https://gist.github.com/BeardStroker/5a8bdfc82cee8ec96b75b8594f5f8d87

I'll test removing both
Edit: Still crashes with both random things and Dynamic Surroundings removed, sooo I'm stumped
https://gist.github.com/BeardStroker/23ab00f178ecfda840b25fe1bcf968cb

Here are the lines starting with soundCategory from the options.txt file:

soundCategory_master:0.29801324
soundCategory_music:0.23239437
soundCategory_record:1.0
soundCategory_weather:1.0
soundCategory_block:1.0
soundCategory_hostile:1.0
soundCategory_neutral:1.0
soundCategory_player:1.0
soundCategory_ambient:1.0
soundCategory_voice:1.0
soundCategory_ds_footsteps:1.0
soundCategory_ds_biome:1.0

Same thing has been happening to me, but only in a server. Whenever I use a spell - if im in the area where the spell was cast - I get kicked from the game with the same error code. However, If I use a spell and i'm not in its aoe then it works just fine? very strange ://

Works just fine in single player though

Same problem as everyone else however just kicks the player from the server and they can just rejoin. I also happen to use random things in the pack,

Issue is intermittent and can be reproduced without randomthings.
I've also noticed the 'Spells' sound category doesn't always shows up in the options menu.

im having a similar problem when it comes to sounds in all the mods I have in, I have the midnight and wizardry and both seem to be having this problem. anything I can do as a fix myself?

That's interesting, I don't have Midnight installed and only had this problem after adding Wizardry.

the problem did get worse after adding wizardry. but I did notice it having the problem too. side question how do I find the sound cache of things

okay so doing my own testing and I disabled wizardry and I am able to access my sound menu again, as well had a crash on a mp server and heres the crash log
(I am also so sorry about all the problems happening)
https://paste.dimdev.org/ludizinobi.mccrash I think my midnight problems are something different so ignore me on that side of things, also electrobob I am willing to send you my mudpack if you want it for trying to find the problem. its just a private pack for me and my friends.

Now i dont think wizardry is the cause of the problems since i had it with midnight before i added wizardry but more of just the sound library causing the problems if i read through these things properly. However even if thats the case i am still unsure about why thats causing the music and sounds to crash whenever you try opening it to well change individual volumes of things

Issue is intermittent and can be reproduced without randomthings, without mightnight, without wizardry.

Possible workaround, I've got the same issue but making a new profile and transferring config, mods And saves folders to the new profile and the problem doesn't happen, might produce different results for others.
Edit: Don't transfer the saves folder, you need to make a new save.

After comparing all these different crash reports, these are all the mods that all the reports on here share.
https://hastebin.com/awaqoxusaj.rb

I hope to see fix to this soon, i really do not want to remove this mod from of the server, as this bug is causing way too much issues...

Roll it back to a previous version. Didnt hurt our server but you may run across missing texture spell books.

Missed this, it's actually yet another duplicate of #198 (or rather, #198 is a duplicate of this one).