Crash while loading on 1.15.2

[Kyx-001]

No other mods installed, with error "The game crashed whilst initializing game Error: java.lang.RuntimeException: java.lang.reflect.InvocationTargetException Exit Code: -1"

[Kyx-001]

Time: 01/12/20 22:55 Description: Initializing game

java.lang.RuntimeException: java.lang.reflect.InvocationTargetException at net.minecraftforge.fml.javafmlmod.FMLJavaModLanguageProvider$FMLModTarget.loadMod(FMLJavaModLanguageProvider.java:78) ~[?:31.1] {re:classloading} at net.minecraftforge.fml.ModLoader.buildModContainerFromTOML(ModLoader.java:234) ~[?:?] {re:classloading} at net.minecraftforge.fml.ModLoader.lambda$buildMods$26(ModLoader.java:214) ~[?:?] {re:classloading} at net.minecraftforge.fml.ModLoader$$Lambda$2152/1873631950.apply(Unknown Source) ~[?:?] {} at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193) ~[?:1.8.0_51] {} at java.util.HashMap$EntrySpliterator.forEachRemaining(HashMap.java:1683) ~[?:1.8.0_51] {} at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:512) ~[?:1.8.0_51] {} at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:502) ~[?:1.8.0_51] {} at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708) ~[?:1.8.0_51] {} at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[?:1.8.0_51] {} at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:499) ~[?:1.8.0_51] {} at net.minecraftforge.fml.ModLoader.buildMods(ModLoader.java:216) ~[?:?] {re:classloading} at net.minecraftforge.fml.ModLoader.lambda$gatherAndInitializeMods$18(ModLoader.java:173) ~[?:?] {re:classloading} at net.minecraftforge.fml.ModLoader$$Lambda$2149/778350106.apply(Unknown Source) ~[?:?] {} at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193) ~[?:1.8.0_51] {} at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193) ~[?:1.8.0_51] {} at java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1374) ~[?:1.8.0_51] {} at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:512) ~[?:1.8.0_51] {} at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:502) ~[?:1.8.0_51] {} at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708) ~[?:1.8.0_51] {} at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[?:1.8.0_51] {} at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:499) ~[?:1.8.0_51] {} at net.minecraftforge.fml.ModLoader.gatherAndInitializeMods(ModLoader.java:175) ~[?:?] {re:classloading} at net.minecraftforge.fml.client.ClientModLoader.lambda$begin$2(ClientModLoader.java:97) ~[?:?] {re:classloading,pl:runtimedistcleaner:A} at net.minecraftforge.fml.client.ClientModLoader$$Lambda$2056/251266229.run(Unknown Source) ~[?:?] {} at net.minecraftforge.fml.client.ClientModLoader.lambda$createRunnableWithCatch$5(ClientModLoader.java:113) ~[?:?] {re:classloading,pl:runtimedistcleaner:A} at net.minecraftforge.fml.client.ClientModLoader$$Lambda$2057/176203926.run(Unknown Source) ~[?:?] {} at net.minecraftforge.fml.client.ClientModLoader.begin(ClientModLoader.java:97) ~[?:?] {re:classloading,pl:runtimedistcleaner:A} at net.minecraft.client.Minecraft.(Minecraft.java:393) [?:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A} at net.minecraft.client.main.Main.main(SourceFile:166) [?:?] {re:classloading} at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_51] {} at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_51] {} at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_51] {} at java.lang.reflect.Method.invoke(Method.java:497) ~[?:1.8.0_51] {} at net.minecraftforge.fml.loading.FMLClientLaunchProvider.lambda$launchService$0(FMLClientLaunchProvider.java:56) [forge-1.15.2-31.1.0.jar:31.1] {} at net.minecraftforge.fml.loading.FMLClientLaunchProvider$$Lambda$395/1925785585.call(Unknown Source) [forge-1.15.2-31.1.0.jar:31.1] {} at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:37) [modlauncher-5.0.0-milestone.4.jar:?] {} at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:54) [modlauncher-5.0.0-milestone.4.jar:?] {} at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:72) [modlauncher-5.0.0-milestone.4.jar:?] {} at cpw.mods.modlauncher.Launcher.run(Launcher.java:81) [modlauncher-5.0.0-milestone.4.jar:?] {} at cpw.mods.modlauncher.Launcher.main(Launcher.java:65) [modlauncher-5.0.0-milestone.4.jar:?] {} Caused by: java.lang.reflect.InvocationTargetException at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[?:1.8.0_51] {} at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[?:1.8.0_51] {} at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[?:1.8.0_51] {} at java.lang.reflect.Constructor.newInstance(Constructor.java:422) ~[?:1.8.0_51] {} at net.minecraftforge.fml.javafmlmod.FMLJavaModLanguageProvider$FMLModTarget.loadMod(FMLJavaModLanguageProvider.java:73) ~[?:31.1] {re:classloading} ... 40 more Caused by: net.minecraftforge.fml.ModLoadingException: Double Slabs has class loading errors ยง7net/minecraftforge/fml/DistExecutor$SafeSupplier at net.minecraftforge.fml.javafmlmod.FMLModContainer.(FMLModContainer.java:77) ~[?:31.1] {re:classloading} at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[?:1.8.0_51] {} at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[?:1.8.0_51] {} at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[?:1.8.0_51] {} at java.lang.reflect.Constructor.newInstance(Constructor.java:422) ~[?:1.8.0_51] {} at net.minecraftforge.fml.javafmlmod.FMLJavaModLanguageProvider$FMLModTarget.loadMod(FMLJavaModLanguageProvider.java:73) ~[?:31.1] {re:classloading} ... 40 more Caused by: java.lang.NoClassDefFoundError: net/minecraftforge/fml/DistExecutor$SafeSupplier at cjminecraft.doubleslabs.common.DoubleSlabs.(DoubleSlabs.java:33) ~[?:2.11.7] {re:classloading} at java.lang.Class.forName0(Native Method) ~[?:1.8.0_51] {} at java.lang.Class.forName(Class.java:348) ~[?:1.8.0_51] {} at net.minecraftforge.fml.javafmlmod.FMLModContainer.(FMLModContainer.java:71) ~[?:31.1] {re:classloading} at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[?:1.8.0_51] {} at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[?:1.8.0_51] {} at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[?:1.8.0_51] {} at java.lang.reflect.Constructor.newInstance(Constructor.java:422) ~[?:1.8.0_51] {} at net.minecraftforge.fml.javafmlmod.FMLJavaModLanguageProvider$FMLModTarget.loadMod(FMLJavaModLanguageProvider.java:73) ~[?:31.1] {re:classloading} ... 40 more Caused by: java.lang.ClassNotFoundException: net.minecraftforge.fml.DistExecutor$SafeSupplier at java.lang.ClassLoader.findClass(ClassLoader.java:530) ~[?:1.8.0_51] {} at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_51] {} at cpw.mods.modlauncher.TransformingClassLoader.loadClass(TransformingClassLoader.java:101) ~[modlauncher-5.0.0-milestone.4.jar:?] {} at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_51] {} at cjminecraft.doubleslabs.common.DoubleSlabs.(DoubleSlabs.java:33) ~[?:2.11.7] {re:classloading} at java.lang.Class.forName0(Native Method) ~[?:1.8.0_51] {} at java.lang.Class.forName(Class.java:348) ~[?:1.8.0_51] {} at net.minecraftforge.fml.javafmlmod.FMLModContainer.(FMLModContainer.java:71) ~[?:31.1] {re:classloading} at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[?:1.8.0_51] {} at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[?:1.8.0_51] {} at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[?:1.8.0_51] {} at java.lang.reflect.Constructor.newInstance(Constructor.java:422) ~[?:1.8.0_51] {} at net.minecraftforge.fml.javafmlmod.FMLJavaModLanguageProvider$FMLModTarget.loadMod(FMLJavaModLanguageProvider.java:73) ~[?:31.1] {re:classloading} ... 40 more

A detailed walkthrough of the error, its code path and all known details is as follows:

-- Head -- Thread: Render thread Stacktrace: at net.minecraftforge.fml.javafmlmod.FMLJavaModLanguageProvider$FMLModTarget.loadMod(FMLJavaModLanguageProvider.java:78) at net.minecraftforge.fml.ModLoader.buildModContainerFromTOML(ModLoader.java:234) at net.minecraftforge.fml.ModLoader.lambda$buildMods$26(ModLoader.java:214) at net.minecraftforge.fml.ModLoader$$Lambda$2152/1873631950.apply(Unknown Source) at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193) at java.util.HashMap$EntrySpliterator.forEachRemaining(HashMap.java:1683) at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:512) at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:502) at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708) at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:499) at net.minecraftforge.fml.ModLoader.buildMods(ModLoader.java:216) at net.minecraftforge.fml.ModLoader.lambda$gatherAndInitializeMods$18(ModLoader.java:173) at net.minecraftforge.fml.ModLoader$$Lambda$2149/778350106.apply(Unknown Source) at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193) at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193) at java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1374) at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:512) at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:502) at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708) at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:499) at net.minecraftforge.fml.ModLoader.gatherAndInitializeMods(ModLoader.java:175) at net.minecraftforge.fml.client.ClientModLoader.lambda$begin$2(ClientModLoader.java:97) at net.minecraftforge.fml.client.ClientModLoader$$Lambda$2056/251266229.run(Unknown Source) at net.minecraftforge.fml.client.ClientModLoader.lambda$createRunnableWithCatch$5(ClientModLoader.java:113) at net.minecraftforge.fml.client.ClientModLoader$$Lambda$2057/176203926.run(Unknown Source) at net.minecraftforge.fml.client.ClientModLoader.begin(ClientModLoader.java:97) at net.minecraft.client.Minecraft.(Minecraft.java:393)

-- Initialization -- Details: Stacktrace: at net.minecraft.client.main.Main.main(SourceFile:166) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:497) at net.minecraftforge.fml.loading.FMLClientLaunchProvider.lambda$launchService$0(FMLClientLaunchProvider.java:56) at net.minecraftforge.fml.loading.FMLClientLaunchProvider$$Lambda$395/1925785585.call(Unknown Source) at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:37) at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:54) at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:72) at cpw.mods.modlauncher.Launcher.run(Launcher.java:81) at cpw.mods.modlauncher.Launcher.main(Launcher.java:65)

[CJMinecraft01]

Thank you for the bug report and sorry for the delayed response. Please could you try updating forge to the latest version for the Minecraft version you are using. That should fix the issue you are seeing here :)