Mod loading fails with java.lang.StringIndexOutOfBoundsException

[luckykid]

I am pretty new to modding and I cant get my mod to load. Minecraft wont load and it keeps giving me this error java.lang.StringIndexOutOfBoundsException: begin 0, end -1, length 11

@Mod("testmod")
public class testmod {
    private static final DeferredRegister<Block> BLOCKS = DeferredRegister.create(ForgeRegistries.BLOCKS, "testmod");

    public static final RegistryObject<Block> PLASTIC_BLOCK = BLOCKS.register("Plastic", () -> new Block(BlockBehaviour.Properties.of(Material.STONE).strength(5f).color(MaterialColor.COLOR_BLUE)));
    public archemistry() {
        BLOCKS.register(FMLJavaModLoadingContext.get().getModEventBus());
    }
}

This is the class that keeps breaking it

[warjort]

Why don't you show the full error message?

One obvious thing is you can't have uppercase characters in block names or any ResourceLocation.

But AFAIK you don't get that error message for this.

[luckykid]

this is the full crash message

java.lang.Exception: Mod Loading has failed
    at net.minecraftforge.logging.CrashReportExtender.dumpModLoadingCrashReport(CrashReportExtender.java:55) ~[forge-1.19.2-43.0.11_mapped_official_1.19.2-recomp.jar%23183%23190!/:?] {re:classloading}
    at net.minecraftforge.client.loading.ClientModLoader.completeModLoading(ClientModLoader.java:167) ~[forge-1.19.2-43.0.11_mapped_official_1.19.2-recomp.jar%23183%23190!/:?] {re:classloading,pl:runtimedistcleaner:A}
    at net.minecraft.client.Minecraft.lambda$new$2(Minecraft.java:583) ~[forge-1.19.2-43.0.11_mapped_official_1.19.2-recomp.jar%23184!/:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
    at net.minecraft.Util.ifElse(Util.java:438) ~[forge-1.19.2-43.0.11_mapped_official_1.19.2-recomp.jar%23184!/:?] {re:classloading}
    at net.minecraft.client.Minecraft.lambda$new$3(Minecraft.java:577) ~[forge-1.19.2-43.0.11_mapped_official_1.19.2-recomp.jar%23184!/:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
    at net.minecraft.client.gui.screens.LoadingOverlay.render(LoadingOverlay.java:135) ~[forge-1.19.2-43.0.11_mapped_official_1.19.2-recomp.jar%23184!/:?] {re:classloading,pl:runtimedistcleaner:A}
    at net.minecraft.client.renderer.GameRenderer.render(GameRenderer.java:885) ~[forge-1.19.2-43.0.11_mapped_official_1.19.2-recomp.jar%23184!/:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
    at net.minecraft.client.Minecraft.runTick(Minecraft.java:1113) ~[forge-1.19.2-43.0.11_mapped_official_1.19.2-recomp.jar%23184!/:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
    at net.minecraft.client.Minecraft.run(Minecraft.java:698) ~[forge-1.19.2-43.0.11_mapped_official_1.19.2-recomp.jar%23184!/:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
    at net.minecraft.client.main.Main.run(Main.java:212) ~[forge-1.19.2-43.0.11_mapped_official_1.19.2-recomp.jar%23184!/:?] {re:classloading,pl:runtimedistcleaner:A}
    at net.minecraft.client.main.Main.main(Main.java:51) ~[forge-1.19.2-43.0.11_mapped_official_1.19.2-recomp.jar%23184!/:?] {re:classloading,pl:runtimedistcleaner:A}
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:?] {}
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) ~[?:?] {}
    at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:?] {}
    at java.lang.reflect.Method.invoke(Method.java:568) ~[?:?] {}
    at net.minecraftforge.fml.loading.targets.ForgeClientUserdevLaunchHandler.lambda$launchService$0(ForgeClientUserdevLaunchHandler.java:25) ~[fmlloader-1.19.2-43.0.11.jar%2395!/:?] {}
    at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:30) [modlauncher-10.0.8.jar%23108!/:?] {}
    at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:53) [modlauncher-10.0.8.jar%23108!/:?] {}
    at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:71) [modlauncher-10.0.8.jar%23108!/:?] {}
    at cpw.mods.modlauncher.Launcher.run(Launcher.java:106) [modlauncher-10.0.8.jar%23108!/:?] {}
    at cpw.mods.modlauncher.Launcher.main(Launcher.java:77) [modlauncher-10.0.8.jar%23108!/:?] {}
    at cpw.mods.modlauncher.BootstrapLaunchConsumer.accept(BootstrapLaunchConsumer.java:26) [modlauncher-10.0.8.jar%23108!/:?] {}
    at cpw.mods.modlauncher.BootstrapLaunchConsumer.accept(BootstrapLaunchConsumer.java:23) [modlauncher-10.0.8.jar%23108!/:?] {}
    at cpw.mods.bootstraplauncher.BootstrapLauncher.main(BootstrapLauncher.java:141) [bootstraplauncher-1.1.2.jar:?] {}

[warjort]

Nope.

It doesn't even show the StringIndexOutOfBoundException you partially quoted earlier.

[luckykid]

thats just what it says on the minecraft app

 

[luckykid]

and in the detailed description right here

Thread: Render thread
Stacktrace:
    at java.lang.String.checkBoundsBeginEnd(String.java:4604) ~[?:?] {}
-- MOD testmod --
Details:
    Mod File: /C:/Users/asher/OneDrive/Desktop/Forge/My Mod/run/mods/testmod-1.0.jar
    Failure message: Testmod has class loading errors
        java.lang.StringIndexOutOfBoundsException: begin 0, end -1, length 11
    Mod Version: 1.0.0.0
    Mod Issue URL: NOT PROVIDED
    Exception message: java.lang.StringIndexOutOfBoundsException: begin 0, end -1, length 11
Stacktrace:
    at java.lang.String.checkBoundsBeginEnd(String.java:4604) ~[?:?] {}
    at java.lang.String.substring(String.java:2707) ~[?:?] {}
    at cpw.mods.cl.ProtectionDomainHelper.tryDefinePackage(ProtectionDomainHelper.java:32) ~[securejarhandler-2.1.4.jar:?] {}
    at cpw.mods.cl.ModuleClassLoader.readerToClass(ModuleClassLoader.java:117) ~[securejarhandler-2.1.4.jar:?] {}
    at cpw.mods.cl.ModuleClassLoader.lambda$findClass$15(ModuleClassLoader.java:219) ~[securejarhandler-2.1.4.jar:?] {}
    at cpw.mods.cl.ModuleClassLoader.loadFromModule(ModuleClassLoader.java:229) ~[securejarhandler-2.1.4.jar:?] {}
    at cpw.mods.cl.ModuleClassLoader.findClass(ModuleClassLoader.java:219) ~[securejarhandler-2.1.4.jar:?] {}
    at java.lang.ClassLoader.loadClass(ClassLoader.java:632) ~[?:?] {}
    at java.lang.Class.forName(Class.java:545) ~[?:?] {}
    at net.minecraftforge.fml.javafmlmod.FMLModContainer.<init>(FMLModContainer.java:48) ~[javafmllanguage-1.19.2-43.0.11.jar%23185!/:?] {}
    at jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[?:?] {}
    at jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:77) ~[?:?] {}
    at jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[?:?] {}
    at java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:499) ~[?:?] {}
    at java.lang.reflect.Constructor.newInstance(Constructor.java:480) ~[?:?] {}
    at net.minecraftforge.fml.javafmlmod.FMLJavaModLanguageProvider$FMLModTarget.loadMod(FMLJavaModLanguageProvider.java:62) ~[javafmllanguage-1.19.2-43.0.11.jar%23185!/:?] {}
    at net.minecraftforge.fml.ModLoader.buildModContainerFromTOML(ModLoader.java:276) ~[fmlcore-1.19.2-43.0.11.jar%23188!/:?] {}
    at net.minecraftforge.fml.ModLoader.lambda$buildMods$29(ModLoader.java:255) ~[fmlcore-1.19.2-43.0.11.jar%23188!/:?] {}
    at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:197) ~[?:?] {}
    at java.util.HashMap$EntrySpliterator.forEachRemaining(HashMap.java:1850) ~[?:?] {}
    at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) ~[?:?] {}
    at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) ~[?:?] {}
    at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:921) ~[?:?] {}
    at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[?:?] {}
    at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:682) ~[?:?] {}
    at net.minecraftforge.fml.ModLoader.buildMods(ModLoader.java:257) ~[fmlcore-1.19.2-43.0.11.jar%23188!/:?] {}
    at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:197) ~[?:?] {}
    at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:197) ~[?:?] {}
    at java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1625) ~[?:?] {}
    at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) ~[?:?] {}
    at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) ~[?:?] {}
    at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:575) ~[?:?] {}
    at java.util.stream.AbstractPipeline.evaluateToArrayNode(AbstractPipeline.java:260) ~[?:?] {}
    at java.util.stream.ReferencePipeline.toArray(ReferencePipeline.java:616) ~[?:?] {}
    at java.util.stream.ReferencePipeline.toArray(ReferencePipeline.java:622) ~[?:?] {}
    at java.util.stream.ReferencePipeline.toList(ReferencePipeline.java:627) ~[?:?] {}
    at net.minecraftforge.fml.ModLoader.gatherAndInitializeMods(ModLoader.java:175) ~[fmlcore-1.19.2-43.0.11.jar%23188!/:?] {}
    at net.minecraftforge.client.loading.ClientModLoader.lambda$begin$1(ClientModLoader.java:91) ~[forge-1.19.2-43.0.11_mapped_official_1.19.2-recomp.jar%23183%23190!/:?] {re:classloading,pl:runtimedistcleaner:A}
    at net.minecraftforge.client.loading.ClientModLoader.lambda$createRunnableWithCatch$4(ClientModLoader.java:111) ~[forge-1.19.2-43.0.11_mapped_official_1.19.2-recomp.jar%23183%23190!/:?] {re:classloading,pl:runtimedistcleaner:A}
    at net.minecraftforge.client.loading.ClientModLoader.begin(ClientModLoader.java:91) ~[forge-1.19.2-43.0.11_mapped_official_1.19.2-recomp.jar%23183%23190!/:?] {re:classloading,pl:runtimedistcleaner:A}
    at net.minecraft.client.Minecraft.<init>(Minecraft.java:468) ~[forge-1.19.2-43.0.11_mapped_official_1.19.2-recomp.jar%23184!/:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
    at net.minecraft.client.main.Main.run(Main.java:176) ~[forge-1.19.2-43.0.11_mapped_official_1.19.2-recomp.jar%23184!/:?] {re:classloading,pl:runtimedistcleaner:A}
    at net.minecraft.client.main.Main.main(Main.java:51) ~[forge-1.19.2-43.0.11_mapped_official_1.19.2-recomp.jar%23184!/:?] {re:classloading,pl:runtimedistcleaner:A}
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:?] {}
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) ~[?:?] {}
    at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:?] {}
    at java.lang.reflect.Method.invoke(Method.java:568) ~[?:?] {}
    at net.minecraftforge.fml.loading.targets.ForgeClientUserdevLaunchHandler.lambda$launchService$0(ForgeClientUserdevLaunchHandler.java:25) ~[fmlloader-1.19.2-43.0.11.jar%2395!/:?] {}
    at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:30) [modlauncher-10.0.8.jar%23108!/:?] {}
    at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:53) [modlauncher-10.0.8.jar%23108!/:?] {}
    at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:71) [modlauncher-10.0.8.jar%23108!/:?] {}
    at cpw.mods.modlauncher.Launcher.run(Launcher.java:106) [modlauncher-10.0.8.jar%23108!/:?] {}
    at cpw.mods.modlauncher.Launcher.main(Launcher.java:77) [modlauncher-10.0.8.jar%23108!/:?] {}
    at cpw.mods.modlauncher.BootstrapLaunchConsumer.accept(BootstrapLaunchConsumer.java:26) [modlauncher-10.0.8.jar%23108!/:?] {}
    at cpw.mods.modlauncher.BootstrapLaunchConsumer.accept(BootstrapLaunchConsumer.java:23) [modlauncher-10.0.8.jar%23108!/:?] {}
    at cpw.mods.bootstraplauncher.BootstrapLauncher.main(BootstrapLauncher.java:141) [bootstraplauncher-1.1.2.jar:?] {}
 

[warjort]

Looks like your class is not in a package?

For some reason Forge doesn't like mod classes in the root package.

[luckykid]

this may be something unrelated but now intellij can't seem to find minecraft

Exception in thread "main" java.lang.IllegalStateException: Failed to find system mod: minecraft
    at MC-BOOTSTRAP/[email protected]/net.minecraftforge.fml.loading.ModSorter.detectSystemMods(ModSorter.java:181)
    at MC-BOOTSTRAP/[email protected]/net.minecraftforge.fml.loading.ModSorter.buildUniqueList(ModSorter.java:145)
    at MC-BOOTSTRAP/[email protected]/net.minecraftforge.fml.loading.ModSorter.sort(ModSorter.java:53)
    at MC-BOOTSTRAP/[email protected]/net.minecraftforge.fml.loading.moddiscovery.ModValidator.stage2Validation(ModValidator.java:101)
    at MC-BOOTSTRAP/[email protected]/net.minecraftforge.fml.loading.FMLLoader.completeScan(FMLLoader.java:175)
    at MC-BOOTSTRAP/[email protected]/net.minecraftforge.fml.loading.FMLServiceProvider.completeScan(FMLServiceProvider.java:91)
    at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.TransformationServiceDecorator.onCompleteScan(TransformationServiceDecorator.java:174)
    at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.TransformationServicesHandler.lambda$triggerScanCompletion$24(TransformationServicesHandler.java:145)
    at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:197)
    at java.base/java.util.HashMap$ValueSpliterator.forEachRemaining(HashMap.java:1779)
    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/[email protected]/cpw.mods.modlauncher.TransformationServicesHandler.triggerScanCompletion(TransformationServicesHandler.java:147)
    at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.Launcher.run(Launcher.java:94)
    at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.Launcher.main(Launcher.java:77)
    at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.BootstrapLaunchConsumer.accept(BootstrapLaunchConsumer.java:26)
    at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.BootstrapLaunchConsumer.accept(BootstrapLaunchConsumer.java:23)
    at [email protected]/cpw.mods.bootstraplauncher.BootstrapLauncher.main(BootstrapLauncher.java:141)

[warjort]

I suggest, you download the mdk and modify that.

https://docs.minecraftforge.net/en/latest/gettingstarted/

It's almost like you are deliberately trying to make your mod have every possible misconfiguration/error.

While at the same time forcing us to continually ask for information rather than you posting the relevant files you have changed.

And you must have seen the footnote to my posts multiple times now.

 

Most likely this problem is caused by you not specifying your minecraft dependency or run configuration properly in the build.gradle or the mods.toml?

Or you changed something important and didn't regenerate your ide run configurations.

But I can only guess with you drip feeding information.

 

Edited September 24, 2022 by warjort