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Field in GuiScreen not set to public at runtime


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I tried to update my mod from 1.6.4 where I used Java Reflection to access the protected field GuiScreen.buttonList

to 1.7.2 where I decided to switch to access transformers for performance (and compatibility)


I added a *_at.cfg to ressources folder and re-setup the gradlew stuff and now in the eclipse environment everything works fine and everything is public :)


But when I built the jar and tried running it in a not-dev-environment (normal minecraft) I get this error:

java.lang.IllegalAccessError: tried to access field net.minecraft.client.gui.GuiScreen.field_146292_n from class tennox.customselectionbox.CSBClientProxy
at tennox.customselectionbox.CSBClientProxy.onTick(CSBClientProxy.java:31)






public net.minecraft.client.gui.GuiScreen *

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Do you have your Coremod stuff setup? (IFMLLoadingPlugin and the like?)


I have to admit I did forget that... (Will try with that, but if Access Transformers aren't better, I would like to try with reflection)

But to the reflection stuff: It works fine in the decompiled environment, but when build I get this error:

[17:46:06 INFO]: Client> java.lang.NoSuchFieldException: buttonList
[17:46:06 INFO]: Client> 	at java.lang.Class.getDeclaredField(Unknown Source)


My Code:

Field field = guioptions.getClass().getSuperclass().getDeclaredField("buttonList");
List buttons = field.get(guioptions)


I thought Minecraft is decompiled at runtime? Also it said in the Wiki (http://www.minecraftforge.net/wiki/Using_Access_Transformers):

the naming convention should be srg names and Forge packages


What did I understand wrong here?

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Did you check your *at.cfg file is in your built mod jar ?

You also need your manifest file to point to your IFMLLoadingPlugin.


jar {
    // Add Coremod Manifest
    manifest {
        attributes 'FMLCorePlugin': "loadingPlugin.classpath"//to be replaced by the correct classpath
        attributes 'FMLCorePluginContainsFMLMod': true//If you want that too


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The tutorial is a bit unclear. You still need the coremod stuff, it is what makes the modifications work in the compiled minecraft (for the end-user, outside the development environment).

For your development environment, ForgeGradle applies the modifications directly.


Too complicated for what I want, just using Reflection now :)



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