Error Message "Caused by: java.lang.NoSuchMethodError: 'int java.util.List.pSize()'"

[zack1stplayer]

My repo

Ran into this error the first time I tried to launch the game with v2025.01.05-1.21.4 as my mapping version, I downgraded until I found a working version. The first working version I found was v1.21.3-2024.12.07-1.21.4

I believe this log contains all the requested version info:

[18Jan2025 00:20:17.332] [main/INFO] [cpw.mods.modlauncher.Launcher/MODLAUNCHER]: JVM identified as Eclipse Adoptium OpenJDK 64-Bit Server VM 21.0.5+11-LTS
[18Jan2025 00:20:17.333] [main/INFO] [cpw.mods.modlauncher.Launcher/MODLAUNCHER]: ModLauncher 10.2.3 starting: java version 21.0.5 by Eclipse Adoptium; OS Windows 11 arch amd64 version 10.0
[18Jan2025 00:20:17.408] [main/INFO] [net.minecraftforge.fml.loading.ImmediateWindowHandler/]: Loading ImmediateWindowProvider fmlearlywindow
[18Jan2025 00:20:17.503] [main/INFO] [EARLYDISPLAY/]: Trying GL version 4.6
[18Jan2025 00:20:17.644] [main/INFO] [EARLYDISPLAY/]: Requested GL version 4.6 got version 4.6
[18Jan2025 00:20:17.717] [main/INFO] [mixin/]: SpongePowered MIXIN Subsystem Version=0.8.7 Source=jar:file:///C:/Users/User/.gradle/caches/modules-2/files-2.1/org.spongepowered/mixin/0.8.7/8ab114ac385e6dbdad5efafe28aba4df8120915f/mixin-0.8.7.jar!/ Service=ModLauncher Env=CLIENT
[18Jan2025 00:20:17.920] [EarlyDisplay/INFO] [EARLYDISPLAY/]: GL info: NVIDIA GeForce RTX 3060/PCIe/SSE2 GL version 4.6.0 NVIDIA 560.94, NVIDIA Corporation
[18Jan2025 00:20:18.636] [main/INFO] [net.minecraftforge.fml.loading.moddiscovery.JarInJarDependencyLocator/]: No dependencies to load found. Skipping!
[18Jan2025 00:20:19.371] [main/INFO] [cpw.mods.modlauncher.LaunchServiceHandler/MODLAUNCHER]: Launching target 'forge_userdev_client' with arguments [--version, MOD_DEV, --gameDir, ., --assetsDir, C:\Users\User\.gradle\caches\forge_gradle\assets, --assetIndex, 19]
[18Jan2025 00:20:20.394] [Datafixer Bootstrap/INFO] [com.mojang.datafixers.DataFixerBuilder/]: 243 Datafixer optimizations took 266 milliseconds

The following log is the end of a typical console output when trying to run the game:

[00:10:06] [main/DEBUG] [mixin/]: Preparing mixins for MixinEnvironment[DEFAULT]
[00:10:07] [main/DEBUG] [io.ne.ut.in.lo.InternalLoggerFactory/]: Using SLF4J as the default logging framework
[00:10:07] [main/DEBUG] [io.ne.ut.ResourceLeakDetector/]: -Dio.netty.leakDetection.level: simple
[00:10:07] [main/DEBUG] [io.ne.ut.ResourceLeakDetector/]: -Dio.netty.leakDetection.targetRecords: 4
[00:10:07] [Datafixer Bootstrap/INFO] [mojang/DataFixerBuilder]: 243 Datafixer optimizations took 369 milliseconds
Exception in thread "main" java.lang.reflect.InvocationTargetException
	at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:118)
	at java.base/java.lang.reflect.Method.invoke(Method.java:580)
	at net.minecraftforge.bootstrap.Bootstrap.bootstrapMain(Bootstrap.java:133)
	at net.minecraftforge.bootstrap.Bootstrap.start(Bootstrap.java:53)
	at net.minecraftforge.bootstrap.ForgeBootstrap.main(ForgeBootstrap.java:19)
Caused by: java.lang.reflect.InvocationTargetException
	at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:118)
	at java.base/java.lang.reflect.Method.invoke(Method.java:580)
	at SECURE-BOOTSTRAP/net.minecraftforge.fmlloader@1.21.4-54.0.16/net.minecraftforge.fml.loading.targets.CommonLaunchHandler.runTarget(CommonLaunchHandler.java:96)
	at SECURE-BOOTSTRAP/net.minecraftforge.fmlloader@1.21.4-54.0.16/net.minecraftforge.fml.loading.targets.CommonLaunchHandler.lambda$makeService$0(CommonLaunchHandler.java:79)
Caused by: java.lang.reflect.InvocationTargetException

	at SECURE-BOOTSTRAP/cpw.mods.modlauncher@10.2.3/cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:77)
	at SECURE-BOOTSTRAP/cpw.mods.modlauncher@10.2.3/cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:97)
	at SECURE-BOOTSTRAP/cpw.mods.modlauncher@10.2.3/cpw.mods.modlauncher.Launcher.run(Launcher.java:116)
	at SECURE-BOOTSTRAP/cpw.mods.modlauncher@10.2.3/cpw.mods.modlauncher.Launcher.main(Launcher.java:75)
	at SECURE-BOOTSTRAP/cpw.mods.modlauncher@10.2.3/cpw.mods.modlauncher.BootstrapEntry.main(BootstrapEntry.java:17)
	at net.minecraftforge.bootstrap@2.1.7/net.minecraftforge.bootstrap.Bootstrap.moduleMain(Bootstrap.java:188)
	at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
	... 4 more
Caused by: java.lang.NoSuchMethodError: 'int java.util.List.pSize()'
	at TRANSFORMER/minecraft@1.21.4/net.minecraft.SystemReport.lambda$new$3(SystemReport.java:60)
	at TRANSFORMER/minecraft@1.21.4/net.minecraft.SystemReport.setDetail(SystemReport.java:70)
	at TRANSFORMER/minecraft@1.21.4/net.minecraft.SystemReport.<init>(SystemReport.java:58)
Caused by: java.lang.NoSuchMethodError: 'int java.util.List.pSize()'

	at TRANSFORMER/minecraft@1.21.4/net.minecraft.CrashReport.<init>(CrashReport.java:32)
	at TRANSFORMER/minecraft@1.21.4/net.minecraft.CrashReport.forThrowable(CrashReport.java:199)
	at TRANSFORMER/minecraft@1.21.4/net.minecraft.client.main.Main.main(Main.java:196)
	at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
	... 14 more

> Task :net.minecraftforge.bootstrap.ForgeBootstrap.main() FAILED

I've also attached a full debug log from my latest attempt at launching.

Sorry if a lot of this isn't helpful data, I'm extremely tired and would like to just go to bed rn, but I'm getting whatever I can together for this before I do so.

debug-1.log.gz