[MC 1.3.2, Forge 4 #239] IllegalArgumentException on mod that previously worked

[Malivil]

When upgrading to Forge build #239, this IllegalArgumentException started happening when loading MineCraft with a mod that previously worked perfectly.

 

The mod is SuperSlopes available here: thread download

 

Error:

 

java.lang.IllegalArgumentException: Can not set static metadark.mods.SuperSlopes.Slopes.Slopes field metadark.mods.SuperSlopes.Slopes.Slopes.instance to metadark.mods.SuperSlopes.Corners.Corners
at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(Unknown Source)
at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(Unknown Source)
at sun.reflect.UnsafeStaticObjectFieldAccessorImpl.set(Unknown Source)
at java.lang.reflect.Field.set(Unknown Source)
at cpw.mods.fml.common.FMLModContainer.parseSimpleFieldAnnotation(FMLModContainer.java:331)
at cpw.mods.fml.common.FMLModContainer.processFieldAnnotations(FMLModContainer.java:255)
at cpw.mods.fml.common.FMLModContainer.constructMod(FMLModContainer.java:351)
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 com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:69)
at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:317)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:300)
at com.google.common.eventbus.EventBus.post(EventBus.java:268)
at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java:124)
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 com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:69)
at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:317)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:300)
at com.google.common.eventbus.EventBus.post(EventBus.java:268)
at cpw.mods.fml.common.LoadController.distributeStateMessage(LoadController.java:81)
at cpw.mods.fml.common.Loader.loadMods(Loader.java:442)
at cpw.mods.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:141)
at net.minecraft.client.Minecraft.a(Minecraft.java:405)
at net.minecraft.client.Minecraft.run(Minecraft.java:737)
at java.lang.Thread.run(Unknown Source)
2012-08-29 14:15:53 [sEVERE] [ForgeModLoader] Caught exception from SuperSlopes_IntCorners
java.lang.IllegalArgumentException: Can not set static metadark.mods.SuperSlopes.Slopes.Slopes field metadark.mods.SuperSlopes.Slopes.Slopes.instance to metadark.mods.SuperSlopes.IntCorners.IntCorners
at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(Unknown Source)
at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(Unknown Source)
at sun.reflect.UnsafeStaticObjectFieldAccessorImpl.set(Unknown Source)
at java.lang.reflect.Field.set(Unknown Source)
at cpw.mods.fml.common.FMLModContainer.parseSimpleFieldAnnotation(FMLModContainer.java:331)
at cpw.mods.fml.common.FMLModContainer.processFieldAnnotations(FMLModContainer.java:255)
at cpw.mods.fml.common.FMLModContainer.constructMod(FMLModContainer.java:351)
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 com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:69)
at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:317)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:300)
at com.google.common.eventbus.EventBus.post(EventBus.java:268)
at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java:124)
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 com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:69)
at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:317)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:300)
at com.google.common.eventbus.EventBus.post(EventBus.java:268)
at cpw.mods.fml.common.LoadController.distributeStateMessage(LoadController.java:81)
at cpw.mods.fml.common.Loader.loadMods(Loader.java:442)
at cpw.mods.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:141)
at net.minecraft.client.Minecraft.a(Minecraft.java:405)
at net.minecraft.client.Minecraft.run(Minecraft.java:737)
at java.lang.Thread.run(Unknown Source)
2012-08-29 14:15:53 [sEVERE] [ForgeModLoader] Caught exception from SuperSlopes_Slopes
java.lang.IllegalArgumentException: Can not set static metadark.mods.SuperSlopes.Corners.Corners field metadark.mods.SuperSlopes.Corners.Corners.instance to metadark.mods.SuperSlopes.Slopes.Slopes
at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(Unknown Source)
at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(Unknown Source)
at sun.reflect.UnsafeStaticObjectFieldAccessorImpl.set(Unknown Source)
at java.lang.reflect.Field.set(Unknown Source)
at cpw.mods.fml.common.FMLModContainer.parseSimpleFieldAnnotation(FMLModContainer.java:331)
at cpw.mods.fml.common.FMLModContainer.processFieldAnnotations(FMLModContainer.java:255)
at cpw.mods.fml.common.FMLModContainer.constructMod(FMLModContainer.java:351)
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 com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:69)
at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:317)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:300)
at com.google.common.eventbus.EventBus.post(EventBus.java:268)
at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java:124)
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 com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:69)
at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:317)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:300)
at com.google.common.eventbus.EventBus.post(EventBus.java:268)
at cpw.mods.fml.common.LoadController.distributeStateMessage(LoadController.java:81)
at cpw.mods.fml.common.Loader.loadMods(Loader.java:442)
at cpw.mods.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:141)
at net.minecraft.client.Minecraft.a(Minecraft.java:405)
at net.minecraft.client.Minecraft.run(Minecraft.java:737)
at java.lang.Thread.run(Unknown Source)

 

 

Full log is attached for your reference.

ForgeModLoader-client-1.log

[LexManos]

https://github.com/SirSengir/BuildCraft/commit/8d05d476f653ca28f31181661a6aac2f8ecfc2e3

Looks like the issue is he isnt specifying instance value properly, and supplying multiple mods in his distro so FML doesn't know which instance goes where.

[Malivil]

Ok, I'll let him know that.

 

Thanks for replying so quickly.

 

As a point of interest, why would this have started happening in the latest Forge builds? Or does it have nothing to do with that, and is a timing issue or something that would only happen periodically?

[LexManos]

It would probably be because of nothing related to the forge builds.

This system has been in place for a while.

[cpw]

@mod.instance did receive an update. Unfortunately. If its a multi mod package it might fail where previously it worked. Send the mod author this way if he doesn't understand the change...