Failed to find `net/minecraft/client/Minecraft.class` on the classpath

Question

Failed to find `net/minecraft/client/Minecraft.class` on the classpath

Closed this issue 6 months ago · 1 comments

After updating to the newest neoforge beta (21.0.87-beta), i got the following error:

Exception in thread "main" net.neoforged.fml.ModLoadingException: Loading errors encountered:
	- Failed to find net/minecraft/client/Minecraft.class on the classpath

	at MC-BOOTSTRAP/fml_loader@4.0.18/net.neoforged.fml.util.DevEnvUtils.findFileSystemRootOfFileOnClasspath(DevEnvUtils.java:76)
	at MC-BOOTSTRAP/fml_loader@4.0.18/net.neoforged.fml.loading.targets.CommonUserdevLaunchHandler.collectAdditionalModFileLocators(CommonUserdevLaunchHandler.java:24)
	at MC-BOOTSTRAP/fml_loader@4.0.18/net.neoforged.fml.loading.FMLLoader.beginModScan(FMLLoader.java:122)
	at MC-BOOTSTRAP/fml_loader@4.0.18/net.neoforged.fml.loading.FMLServiceProvider.beginScanning(FMLServiceProvider.java:84)
	at MC-BOOTSTRAP/cpw.mods.modlauncher@11.0.4/cpw.mods.modlauncher.TransformationServiceDecorator.runScan(TransformationServiceDecorator.java:97)
	at MC-BOOTSTRAP/cpw.mods.modlauncher@11.0.4/cpw.mods.modlauncher.TransformationServicesHandler.lambda$runScanningTransformationServices$7(TransformationServicesHandler.java:94)
	at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:197)
	at java.base/java.util.HashMap$ValueSpliterator.forEachRemaining(HashMap.java:1787)
	at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509)
	at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499)
	at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:575)
	at java.base/java.util.stream.AbstractPipeline.evaluateToArrayNode(AbstractPipeline.java:260)
	at java.base/java.util.stream.ReferencePipeline.toArray(ReferencePipeline.java:616)
	at java.base/java.util.stream.ReferencePipeline.toArray(ReferencePipeline.java:622)
	at java.base/java.util.stream.ReferencePipeline.toList(ReferencePipeline.java:627)
	at MC-BOOTSTRAP/cpw.mods.modlauncher@11.0.4/cpw.mods.modlauncher.TransformationServicesHandler.runScanningTransformationServices(TransformationServicesHandler.java:96)
	at MC-BOOTSTRAP/cpw.mods.modlauncher@11.0.4/cpw.mods.modlauncher.TransformationServicesHandler.initializeTransformationServices(TransformationServicesHandler.java:50)
	at MC-BOOTSTRAP/cpw.mods.modlauncher@11.0.4/cpw.mods.modlauncher.Launcher.run(Launcher.java:84)
	at MC-BOOTSTRAP/cpw.mods.modlauncher@11.0.4/cpw.mods.modlauncher.Launcher.main(Launcher.java:74)
	at MC-BOOTSTRAP/cpw.mods.modlauncher@11.0.4/cpw.mods.modlauncher.BootstrapLaunchConsumer.accept(BootstrapLaunchConsumer.java:26)
	at MC-BOOTSTRAP/cpw.mods.modlauncher@11.0.4/cpw.mods.modlauncher.BootstrapLaunchConsumer.accept(BootstrapLaunchConsumer.java:23)
	at cpw.mods.bootstraplauncher@2.0.2/cpw.mods.bootstraplauncher.BootstrapLauncher.run(BootstrapLauncher.java:210)
	at cpw.mods.bootstraplauncher@2.0.2/cpw.mods.bootstraplauncher.BootstrapLauncher.main(BootstrapLauncher.java:69)

I deleted the .gradle and build directories after each version switch to ensure that artifacts wouldn't cause weird behaviour
both build/neoForm/neoFormJoined1.21-20240613.152323/steps/recompile/classes/net/minecraft/client/Minecraft.class and unzipSources/unpacked/net/minecraft/client/Minecraft.java exist
I am using NeoGradle on version 7.0.152, updating to 7.0.154 did not help.
I was previously on version 21.0.45-beta, which appears to be the last working version as upgrading 21.0.46-beta will throw the above error.
I am launching neoforge using the run project feature from Intellij Idea (Version: 2024.1.1 Community Edition, Build: #IC-241.15989.150, April 29, 2024).

Full Output:

/usr/lib/jvm/java-21-openjdk-amd64/bin/java -p /home/fishi/.gradle/caches/modules-2/files-2.1/cpw.mods/bootstraplauncher/2.0.2/1a2d076cbc33b0520cbacd591224427b2a20047d/bootstraplauncher-2.0.2.jar:/home/fishi/.gradle/caches/modules-2/files-2.1/cpw.mods/securejarhandler/3.0.8/c0ef95cecd8699a0449053ac7d9c160748d902cd/securejarhandler-3.0.8.jar:/home/fishi/.gradle/caches/modules-2/files-2.1/org.ow2.asm/asm-commons/9.5/19ab5b5800a3910d30d3a3e64fdb00fd0cb42de0/asm-commons-9.5.jar:/home/fishi/.gradle/caches/modules-2/files-2.1/org.ow2.asm/asm-util/9.5/64b5a1fc8c1b15ed2efd6a063e976bc8d3dc5ffe/asm-util-9.5.jar:/home/fishi/.gradle/caches/modules-2/files-2.1/org.ow2.asm/asm-analysis/9.5/490bacc77de7cbc0be1a30bb3471072d705be4a4/asm-analysis-9.5.jar:/home/fishi/.gradle/caches/modules-2/files-2.1/org.ow2.asm/asm-tree/9.5/fd33c8b6373abaa675be407082fdfda35021254a/asm-tree-9.5.jar:/home/fishi/.gradle/caches/modules-2/files-2.1/org.ow2.asm/asm/9.5/dc6ea1875f4d64fbc85e1691c95b96a3d8569c90/asm-9.5.jar:/home/fishi/.gradle/caches/modules-2/files-2.1/net.neoforged/JarJarFileSystems/0.4.1/78f59f89defcd032ed788b151ca6a0d40ace796a/JarJarFileSystems-0.4.1.jar --add-modules ALL-MODULE-PATH --add-opens java.base/java.util.jar=cpw.mods.securejarhandler --add-opens java.base/java.lang.invoke=cpw.mods.securejarhandler --add-exports java.base/sun.security.util=cpw.mods.securejarhandler --add-exports jdk.naming.dns/com.sun.jndi.dns=java.naming -Dforge.logging.console.level=debug -Dneoforge.enableGameTest=true -Dforge.logging.markers=REGISTRIES -DlegacyClassPath.file=/home/fishi/Processed/.gradle/configuration/neoForm/neoFormJoined1.21-20240613.152323/steps/writeMinecraftClasspathClient/classpath.txt -DignoreList=securejarhandler-3.0.8.jar,asm-9.5.jar,asm-commons-9.5.jar,asm-tree-9.5.jar,asm-util-9.5.jar,asm-analysis-9.5.jar,bootstraplauncher-2.0.2.jar,JarJarFileSystems-0.4.1.jar,mixinextras-neoforge-0.3.5.jar,client-extra,neoforge- -Dfml.gameLayerLibraries -DmergeModules=jna-5.10.0.jar,jna-platform-5.10.0.jar -Dforge.enabledGameTestNamespaces=processed -Djava.net.preferIPv6Addresses=system -Dfml.pluginLayerLibraries -javaagent:/home/fishi/Downloads/idea/lib/idea_rt.jar=41467:/home/fishi/Downloads/idea/bin -Dfile.encoding=UTF-8 -Dsun.stdout.encoding=UTF-8 -Dsun.stderr.encoding=UTF-8 @/tmp/idea_arg_file1027767103 cpw.mods.bootstraplauncher.BootstrapLauncher --launchTarget forgeclientuserdev --version 21.0.45-beta --assetIndex asset-index --assetsDir /home/fishi/.gradle/caches/minecraft/assets/1.21 --gameDir . --fml.neoForgeVersion 21.0.45-beta --fml.fmlVersion 4.0.6 --fml.mcVersion 1.21 --fml.neoFormVersion 20240613.152323
WARN StatusConsoleListener The use of package scanning to locate plugins is deprecated and will be removed in a future release
WARN StatusConsoleListener The use of package scanning to locate plugins is deprecated and will be removed in a future release
WARN StatusConsoleListener The use of package scanning to locate plugins is deprecated and will be removed in a future release
WARN StatusConsoleListener The use of package scanning to locate plugins is deprecated and will be removed in a future release
[16:52:53.489] [main/INFO] [Launcher/MODLAUNCHER]: ModLauncher running: args [--launchTarget, forgeclientuserdev, --version, 21.0.45-beta, --assetIndex, asset-index, --assetsDir, /home/fishi/.gradle/caches/minecraft/assets/1.21, --gameDir, ., --fml.neoForgeVersion, 21.0.45-beta, --fml.fmlVersion, 4.0.6, --fml.mcVersion, 1.21, --fml.neoFormVersion, 20240613.152323] 
[16:52:53.492] [main/INFO] [Launcher/MODLAUNCHER]: JVM identified as Ubuntu OpenJDK 64-Bit Server VM 21.0.3+9-Ubuntu-1ubuntu120.04.1 
[16:52:53.494] [main/INFO] [Launcher/MODLAUNCHER]: ModLauncher 11.0.3+main.0f24dec3 starting: java version 21.0.3 by Ubuntu; OS Linux arch amd64 version 5.4.0-187-generic 
[16:52:53.630] [main/INFO] [loading.ImmediateWindowHandler/]: Loading ImmediateWindowProvider fmlearlywindow 
[16:52:53.775] [main/INFO] [EARLYDISPLAY/]: Trying GL version 4.6 
[16:52:53.843] [main/INFO] [EARLYDISPLAY/]: Requested GL version 4.6 got version 4.6 
[16:52:53.995] [main/INFO] [mixin/]: SpongePowered MIXIN Subsystem Version=0.8.5 Source=union:/home/fishi/.gradle/caches/modules-2/files-2.1/net.fabricmc/sponge-mixin/0.13.4+mixin.0.8.5/8adf0cff1795a169141b9e16ad7b9f6e2527a990/sponge-mixin-0.13.4+mixin.0.8.5.jar%23123!/ Service=ModLauncher Env=CLIENT 
Exception in thread "main" net.neoforged.fml.ModLoadingException: Loading errors encountered:
	- Failed to find net/minecraft/client/Minecraft.class on the classpath

	at MC-BOOTSTRAP/fml_loader@4.0.6/net.neoforged.fml.util.DevEnvUtils.findFileSystemRootOfFileOnClasspath(DevEnvUtils.java:76)
	at MC-BOOTSTRAP/fml_loader@4.0.6/net.neoforged.fml.loading.targets.CommonUserdevLaunchHandler.collectAdditionalModFileLocators(CommonUserdevLaunchHandler.java:24)
	at MC-BOOTSTRAP/fml_loader@4.0.6/net.neoforged.fml.loading.FMLLoader.beginModScan(FMLLoader.java:122)
	at MC-BOOTSTRAP/fml_loader@4.0.6/net.neoforged.fml.loading.FMLServiceProvider.beginScanning(FMLServiceProvider.java:84)
	at MC-BOOTSTRAP/cpw.mods.modlauncher@11.0.3/cpw.mods.modlauncher.TransformationServiceDecorator.runScan(TransformationServiceDecorator.java:97)
	at MC-BOOTSTRAP/cpw.mods.modlauncher@11.0.3/cpw.mods.modlauncher.TransformationServicesHandler.lambda$runScanningTransformationServices$7(TransformationServicesHandler.java:94)
	at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:197)
	at java.base/java.util.HashMap$ValueSpliterator.forEachRemaining(HashMap.java:1787)
	at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509)
	at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499)
	at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:575)
	at java.base/java.util.stream.AbstractPipeline.evaluateToArrayNode(AbstractPipeline.java:260)
	at java.base/java.util.stream.ReferencePipeline.toArray(ReferencePipeline.java:616)
	at java.base/java.util.stream.ReferencePipeline.toArray(ReferencePipeline.java:622)
	at java.base/java.util.stream.ReferencePipeline.toList(ReferencePipeline.java:627)
	at MC-BOOTSTRAP/cpw.mods.modlauncher@11.0.3/cpw.mods.modlauncher.TransformationServicesHandler.runScanningTransformationServices(TransformationServicesHandler.java:96)
	at MC-BOOTSTRAP/cpw.mods.modlauncher@11.0.3/cpw.mods.modlauncher.TransformationServicesHandler.initializeTransformationServices(TransformationServicesHandler.java:50)
	at MC-BOOTSTRAP/cpw.mods.modlauncher@11.0.3/cpw.mods.modlauncher.Launcher.run(Launcher.java:84)
	at MC-BOOTSTRAP/cpw.mods.modlauncher@11.0.3/cpw.mods.modlauncher.Launcher.main(Launcher.java:74)
	at MC-BOOTSTRAP/cpw.mods.modlauncher@11.0.3/cpw.mods.modlauncher.BootstrapLaunchConsumer.accept(BootstrapLaunchConsumer.java:26)
	at MC-BOOTSTRAP/cpw.mods.modlauncher@11.0.3/cpw.mods.modlauncher.BootstrapLaunchConsumer.accept(BootstrapLaunchConsumer.java:23)
	at cpw.mods.bootstraplauncher@2.0.2/cpw.mods.bootstraplauncher.BootstrapLauncher.run(BootstrapLauncher.java:210)
	at cpw.mods.bootstraplauncher@2.0.2/cpw.mods.bootstraplauncher.BootstrapLauncher.main(BootstrapLauncher.java:69)

Process finished with exit code 1

Answer 1 · 2024-07-13T16:35:26.000Z

Okay, apparently it works now? I just opened my ide back up to get some more work on the mod done on the old version, but i forgot to switch back to 21.0.45-beta, but it worked on 21.0.87-beta. I am not entirely sure how this happened.