[1.17.1] Shading works, but ClassNotFoundException

[Nearata]

The same setup works fine on 1.16.5

ExampleMod.java

package com.example.examplemod;

import net.minecraftforge.fml.common.Mod;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;

import de.leonhard.storage.Yaml;

import net.minecraft.client.Minecraft;

@Mod("examplemod")
public class ExampleMod
{
    private static final Logger LOGGER = LogManager.getLogger();
	private final Minecraft mc = Minecraft.getInstance();
	private Yaml yaml;

    public ExampleMod() {
		this.yaml = new Yaml("config.yml", mc.gameDirectory.toString());
    }
}

build.gradle

buildscript {
    repositories {
        maven { url = 'https://maven.minecraftforge.net' }
        mavenCentral()
    }
    dependencies {
        classpath group: 'net.minecraftforge.gradle', name: 'ForgeGradle', version: '5.1.+', changing: true
    }
}

plugins {
    id 'com.github.johnrengelman.shadow' version '7.0.0'
}

apply plugin: 'net.minecraftforge.gradle'
apply plugin: 'eclipse'

version = '1.0'
group = 'com.yourname.modid'
archivesBaseName = 'modid'

java.toolchain.languageVersion = JavaLanguageVersion.of(16)

minecraft {
    mappings channel: 'official', version: '1.17.1'
    runs {
        client {
            workingDirectory project.file('run')
            property 'forge.logging.markers', 'REGISTRIES'
            property 'forge.logging.console.level', 'debug'

            mods {
                examplemod {
                    source sourceSets.main
                }
            }
        }
    }
}

sourceSets.main.resources { srcDir 'src/generated/resources' }

repositories {
	maven { url 'https://jitpack.io' }
}

dependencies {
    minecraft 'net.minecraftforge:forge:1.17.1-37.0.74'
	implementation group: 'com.github.simplix-softworks', name: 'simplixstorage', version: '3.2.3'
}

jar {
    manifest {
        attributes([
			"Specification-Title"     : "examplemod",
			"Specification-Vendor"    : "examplemodsareus",
			"Specification-Version"   : "1", // We are version 1 of ourselves
			"Implementation-Title"    : project.name,
			"Implementation-Version"  : project.jar.archiveVersion,
			"Implementation-Vendor"   : "examplemodsareus",
			"Implementation-Timestamp": new Date().format("yyyy-MM-dd'T'HH:mm:ssZ")
        ])
    }
}

jar.finalizedBy('reobfJar')

shadowJar {
    classifier = ''
    dependencies {
        include(dependency('com.github.simplix-softworks:simplixstorage:.*'))
    }
}

reobf {
    shadowJar {}
}

Error

java.lang.reflect.InvocationTargetException: null
	at jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[?:?]
	at jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:78) ~[?:?]
	at jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[?:?]
	at java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:499) ~[?:?]
	at java.lang.reflect.Constructor.newInstance(Constructor.java:480) ~[?:?]
	at net.minecraftforge.fml.javafmlmod.FMLModContainer.constructMod(FMLModContainer.java:81) ~[javafmllanguage-1.17.1-37.0.74.jar%2376!:?]
	at net.minecraftforge.fml.ModContainer.lambda$buildTransitionHandler$4(ModContainer.java:120) ~[fmlcore-1.17.1-37.0.74.jar%2378!:?]
	at java.util.concurrent.CompletableFuture$AsyncRun.run(CompletableFuture.java:1800) [?:?]
	at java.util.concurrent.CompletableFuture$AsyncRun.exec(CompletableFuture.java:1792) [?:?]
	at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:295) [?:?]
	at java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1016) [?:?]
	at java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1665) [?:?]
	at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1598) [?:?]
	at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:183) [?:?]
Caused by: java.lang.NoClassDefFoundError: de/leonhard/storage/Yaml
	at com.example.examplemod.ExampleMod.<init>(ExampleMod.java:19) ~[%2379!:?]
	... 14 more
Caused by: java.lang.ClassNotFoundException: de.leonhard.storage.Yaml
	at jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:636) ~[?:?]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:519) ~[?:?]
	at cpw.mods.cl.ModuleClassLoader.loadClass(ModuleClassLoader.java:132) ~[securejarhandler-0.9.46.jar:?]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:519) ~[?:?]
	at cpw.mods.cl.ModuleClassLoader.loadClass(ModuleClassLoader.java:132) ~[securejarhandler-0.9.46.jar:?]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:519) ~[?:?]
	at com.example.examplemod.ExampleMod.<init>(ExampleMod.java:19) ~[%2379!:?]
	... 14 more

 

Edited October 1, 2021 by Nearata