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[Solved] [1.12.2] Reflection fails to find method

DavidM

By DavidM
in Modder Support

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DavidM World Shaper

DavidM

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Posted (edited)

I am using reflection to get the EntityLiving#getLootTable (SRG name: "func_184647_J") method of an EntityLiving. However, this sometimes (rather rare) fails to work with modded mobs, which, although inherits from the EntityLiving class, does not seems to have the method with SRG name "func_184647_J".

 

The crash report below is an example of EntityGaiaMinotaur from Grimoire of Gaia, which, according to the source code, does inherit from EntityLiving, but does not have the method "func_184647_J".

Note that the EntityLiving#getLootTable (SRG name: "func_184647_J") fetching works with most modded mobs, but not with some specific ones. 

---- Minecraft Crash Report ----
// Ooh. Shiny.

Time: 2019-02-23 08:02:36 EST
Description: Error executing task

java.util.concurrent.ExecutionException: net.minecraftforge.fml.relauncher.ReflectionHelper$UnableToFindMethodException: java.lang.NoSuchMethodException: gaia.entity.monster.EntityGaiaMinotaur.func_184647_J()
    at java.util.concurrent.FutureTask.report(Unknown Source)
    at java.util.concurrent.FutureTask.get(Unknown Source)
    at net.minecraft.util.Util.runTask(SourceFile:531)
    at net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:723)
    at net.minecraft.server.MinecraftServer.tick(MinecraftServer.java:668)
    at net.minecraft.server.integrated.IntegratedServer.tick(IntegratedServer.java:185)
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:526)
    at java.lang.Thread.run(Unknown Source)
Caused by: net.minecraftforge.fml.relauncher.ReflectionHelper$UnableToFindMethodException: java.lang.NoSuchMethodException: gaia.entity.monster.EntityGaiaMinotaur.func_184647_J()
    at net.minecraftforge.fml.relauncher.ReflectionHelper.findMethod(ReflectionHelper.java:303)
    at cn.davidma.tinymobfarm.util.LootTableHelper.getLootTableLocation(LootTableHelper.java:27)
    at cn.davidma.tinymobfarm.item.Lasso.interactEntity(Lasso.java:66)
    at cn.davidma.tinymobfarm.item.template.InteractiveMobTool.itemInteractionForEntity(InteractiveMobTool.java:61)
    at net.minecraft.item.ItemStack.interactWithEntity(ItemStack.java:391)
    at net.minecraft.entity.player.EntityPlayer.interactOn(EntityPlayer.java:1220)
    at com.tmtravlr.potioncore.network.PacketHandlerServer.useEntity(PacketHandlerServer.java:96)
    at com.tmtravlr.potioncore.network.PacketHandlerServer.lambda$onMessage$1(PacketHandlerServer.java:66)
    at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
    at java.util.concurrent.FutureTask.run(Unknown Source)
    at net.minecraft.util.Util.runTask(SourceFile:529)
    ... 5 more
Caused by: java.lang.NoSuchMethodException: gaia.entity.monster.EntityGaiaMinotaur.func_184647_J()
    at java.lang.Class.getDeclaredMethod(Unknown Source)
    at net.minecraftforge.fml.relauncher.ReflectionHelper.findMethod(ReflectionHelper.java:297)
    ... 15 more

 

Edited by DavidM

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Cadiboo Reality Controller

Cadiboo

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Posted

Try stepping through your code with the debugger

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DavidM World Shaper

DavidM

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  On 2/27/2019 at 8:23 AM, diesieben07 said:

Most likely you did not fix the 2nd issue I pointed out.

Expand  

That seems to be the problem. I forgot to change it in my 1.12.2 branch. Thanks.

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