I'll try to keep this simple. Whenever I successfully include a certain dependency for a large project, I get this error (of course, things are a bit more complex, but it'd be hard to explain to a bunch of java programmers):

 

 

 

[16:32:18] [main/ERROR] [LaunchWrapper/]: A critical problem occurred registering the ASM transformer class $wrapper.net.minecraftforge.fml.common.asm.transformers.SideTransformer

java.lang.ClassNotFoundException: $wrapper.net.minecraftforge.fml.common.asm.transformers.SideTransformer

at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191) ~[launchwrapper-1.12.jar:?]

at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_77]

at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_77]

at net.minecraft.launchwrapper.LaunchClassLoader.registerTransformer(LaunchClassLoader.java:88) [launchwrapper-1.12.jar:?]

at net.minecraftforge.fml.relauncher.CoreModManager$FMLPluginWrapper.injectIntoClassLoader(CoreModManager.java:124) [forgeSrc-1.8.9-11.15.1.1722.jar:?]

at net.minecraft.launchwrapper.Launch.launch(Launch.java:115) [launchwrapper-1.12.jar:?]

at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.12.jar:?]

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_77]

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_77]

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_77]

at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_77]

at net.minecraftforge.gradle.GradleStartCommon.launch(GradleStartCommon.java:97) [start/:?]

at GradleStart.main(GradleStart.java:26) [start/:?]

Caused by: net.minecraftforge.fml.common.asm.ASMTransformerWrapper$TransformerException: Exception in class transformer net.minecraftforge.fml.common.asm.transformers.BlamingTransformer@b7f23d9 from coremod FMLCorePlugin

at net.minecraftforge.fml.common.asm.ASMTransformerWrapper$TransformerWrapper.transform(ASMTransformerWrapper.java:234) ~[forgeSrc-1.8.9-11.15.1.1722.jar:?]

at net.minecraft.launchwrapper.LaunchClassLoader.runTransformers(LaunchClassLoader.java:279) ~[launchwrapper-1.12.jar:?]

at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:176) ~[launchwrapper-1.12.jar:?]

... 12 more

Caused by: java.lang.IllegalArgumentException

at org.objectweb.asm.ClassVisitor.<init>(Unknown Source) ~[asm-all-4.2.jar:4.2]

at org.objectweb.asm.ClassVisitor.<init>(Unknown Source) ~[asm-all-4.2.jar:4.2]

at net.minecraftforge.fml.common.asm.transformers.BlamingTransformer$VersionVisitor.<init>(BlamingTransformer.java:49) ~[forgeSrc-1.8.9-11.15.1.1722.jar:?]

at net.minecraftforge.fml.common.asm.transformers.BlamingTransformer.transform(BlamingTransformer.java:33) ~[forgeSrc-1.8.9-11.15.1.1722.jar:?]

at net.minecraftforge.fml.common.asm.ASMTransformerWrapper$TransformerWrapper.transform(ASMTransformerWrapper.java:230) ~[forgeSrc-1.8.9-11.15.1.1722.jar:?]

at net.minecraft.launchwrapper.LaunchClassLoader.runTransformers(LaunchClassLoader.java:279) ~[launchwrapper-1.12.jar:?]

at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:176) ~[launchwrapper-1.12.jar:?]

... 12 more

[16:32:18] [main/TRACE] [FML/]: Registering transformer net.minecraftforge.fml.common.asm.transformers.EventSubscriptionTransformer

[16:32:18] [main/ERROR] [LaunchWrapper/]: A critical problem occurred registering the ASM transformer class $wrapper.net.minecraftforge.fml.common.asm.transformers.EventSubscriptionTransformer

java.lang.ClassNotFoundException: $wrapper.net.minecraftforge.fml.common.asm.transformers.EventSubscriptionTransformer

at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191) ~[launchwrapper-1.12.jar:?]

at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_77]

at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_77]

at net.minecraft.launchwrapper.LaunchClassLoader.registerTransformer(LaunchClassLoader.java:88) [launchwrapper-1.12.jar:?]

at net.minecraftforge.fml.relauncher.CoreModManager$FMLPluginWrapper.injectIntoClassLoader(CoreModManager.java:124) [forgeSrc-1.8.9-11.15.1.1722.jar:?]

at net.minecraft.launchwrapper.Launch.launch(Launch.java:115) [launchwrapper-1.12.jar:?]

at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.12.jar:?]

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_77]

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_77]

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_77]

at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_77]

at net.minecraftforge.gradle.GradleStartCommon.launch(GradleStartCommon.java:97) [start/:?]

at GradleStart.main(GradleStart.java:26) [start/:?]

Caused by: net.minecraftforge.fml.common.asm.ASMTransformerWrapper$TransformerException: Exception in class transformer net.minecraftforge.fml.common.asm.transformers.BlamingTransformer@b7f23d9 from coremod FMLCorePlugin

at net.minecraftforge.fml.common.asm.ASMTransformerWrapper$TransformerWrapper.transform(ASMTransformerWrapper.java:234) ~[forgeSrc-1.8.9-11.15.1.1722.jar:?]

at net.minecraft.launchwrapper.LaunchClassLoader.runTransformers(LaunchClassLoader.java:279) ~[launchwrapper-1.12.jar:?]

at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:176) ~[launchwrapper-1.12.jar:?]

... 12 more

Caused by: java.lang.IllegalArgumentException

at org.objectweb.asm.ClassVisitor.<init>(Unknown Source) ~[asm-all-4.2.jar:4.2]

at org.objectweb.asm.ClassVisitor.<init>(Unknown Source) ~[asm-all-4.2.jar:4.2]

at net.minecraftforge.fml.common.asm.transformers.BlamingTransformer$VersionVisitor.<init>(BlamingTransformer.java:49) ~[forgeSrc-1.8.9-11.15.1.1722.jar:?]

at net.minecraftforge.fml.common.asm.transformers.BlamingTransformer.transform(BlamingTransformer.java:33) ~[forgeSrc-1.8.9-11.15.1.1722.jar:?]

at net.minecraftforge.fml.common.asm.ASMTransformerWrapper$TransformerWrapper.transform(ASMTransformerWrapper.java:230) ~[forgeSrc-1.8.9-11.15.1.1722.jar:?]

at net.minecraft.launchwrapper.LaunchClassLoader.runTransformers(LaunchClassLoader.java:279) ~[launchwrapper-1.12.jar:?]

at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:176) ~[launchwrapper-1.12.jar:?]

... 12 more

[16:32:18] [main/TRACE] [FML/]: Registering transformer net.minecraftforge.fml.common.asm.transformers.EventSubscriberTransformer

[16:32:18] [main/ERROR] [LaunchWrapper/]: A critical problem occurred registering the ASM transformer class $wrapper.net.minecraftforge.fml.common.asm.transformers.EventSubscriberTransformer

java.lang.ClassNotFoundException: $wrapper.net.minecraftforge.fml.common.asm.transformers.EventSubscriberTransformer

at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191) ~[launchwrapper-1.12.jar:?]

at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_77]

at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_77]

at net.minecraft.launchwrapper.LaunchClassLoader.registerTransformer(LaunchClassLoader.java:88) [launchwrapper-1.12.jar:?]

at net.minecraftforge.fml.relauncher.CoreModManager$FMLPluginWrapper.injectIntoClassLoader(CoreModManager.java:124) [forgeSrc-1.8.9-11.15.1.1722.jar:?]

at net.minecraft.launchwrapper.Launch.launch(Launch.java:115) [launchwrapper-1.12.jar:?]

at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.12.jar:?]

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_77]

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_77]

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_77]

at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_77]

at net.minecraftforge.gradle.GradleStartCommon.launch(GradleStartCommon.java:97) [start/:?]

at GradleStart.main(GradleStart.java:26) [start/:?]

Caused by: net.minecraftforge.fml.common.asm.ASMTransformerWrapper$TransformerException: Exception in class transformer net.minecraftforge.fml.common.asm.transformers.BlamingTransformer@b7f23d9 from coremod FMLCorePlugin

at net.minecraftforge.fml.common.asm.ASMTransformerWrapper$TransformerWrapper.transform(ASMTransformerWrapper.java:234) ~[forgeSrc-1.8.9-11.15.1.1722.jar:?]

at net.minecraft.launchwrapper.LaunchClassLoader.runTransformers(LaunchClassLoader.java:279) ~[launchwrapper-1.12.jar:?]

at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:176) ~[launchwrapper-1.12.jar:?]

... 12 more

Caused by: java.lang.IllegalArgumentException

at org.objectweb.asm.ClassVisitor.<init>(Unknown Source) ~[asm-all-4.2.jar:4.2]

at org.objectweb.asm.ClassVisitor.<init>(Unknown Source) ~[asm-all-4.2.jar:4.2]

at net.minecraftforge.fml.common.asm.transformers.BlamingTransformer$VersionVisitor.<init>(BlamingTransformer.java:49) ~[forgeSrc-1.8.9-11.15.1.1722.jar:?]

at net.minecraftforge.fml.common.asm.transformers.BlamingTransformer.transform(BlamingTransformer.java:33) ~[forgeSrc-1.8.9-11.15.1.1722.jar:?]

at net.minecraftforge.fml.common.asm.ASMTransformerWrapper$TransformerWrapper.transform(ASMTransformerWrapper.java:230) ~[forgeSrc-1.8.9-11.15.1.1722.jar:?]

at net.minecraft.launchwrapper.LaunchClassLoader.runTransformers(LaunchClassLoader.java:279) ~[launchwrapper-1.12.jar:?]

at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:176) ~[launchwrapper-1.12.jar:?]

... 12 more

[16:32:18] [main/DEBUG] [FML/]: Injection complete

[16:32:18] [main/DEBUG] [FML/]: Running coremod plugin for FMLCorePlugin {net.minecraftforge.fml.relauncher.FMLCorePlugin}

[16:32:18] [main/DEBUG] [FML/]: Running coremod plugin FMLCorePlugin

[16:32:18] [main/ERROR] [LaunchWrapper/]: Unable to launch

java.lang.RuntimeException: java.lang.ClassNotFoundException: net.minecraftforge.fml.common.asm.FMLSanityChecker

at net.minecraftforge.fml.relauncher.CoreModManager$FMLPluginWrapper.injectIntoClassLoader(CoreModManager.java:161) ~[forgeSrc-1.8.9-11.15.1.1722.jar:?]

at net.minecraft.launchwrapper.Launch.launch(Launch.java:115) [launchwrapper-1.12.jar:?]

at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.12.jar:?]

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_77]

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_77]

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_77]

at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_77]

at net.minecraftforge.gradle.GradleStartCommon.launch(GradleStartCommon.java:97) [start/:?]

at GradleStart.main(GradleStart.java:26) [start/:?]

Caused by: java.lang.ClassNotFoundException: net.minecraftforge.fml.common.asm.FMLSanityChecker

at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191) ~[launchwrapper-1.12.jar:?]

at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_77]

at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_77]

at java.lang.Class.forName0(Native Method) ~[?:1.8.0_77]

at java.lang.Class.forName(Class.java:348) ~[?:1.8.0_77]

at net.minecraftforge.fml.relauncher.CoreModManager$FMLPluginWrapper.injectIntoClassLoader(CoreModManager.java:149) ~[forgeSrc-1.8.9-11.15.1.1722.jar:?]

... 8 more

Caused by: net.minecraftforge.fml.common.asm.ASMTransformerWrapper$TransformerException: Exception in class transformer net.minecraftforge.fml.common.asm.transformers.BlamingTransformer@b7f23d9 from coremod FMLCorePlugin

at net.minecraftforge.fml.common.asm.ASMTransformerWrapper$TransformerWrapper.transform(ASMTransformerWrapper.java:234) ~[forgeSrc-1.8.9-11.15.1.1722.jar:?]

at net.minecraft.launchwrapper.LaunchClassLoader.runTransformers(LaunchClassLoader.java:279) ~[launchwrapper-1.12.jar:?]

at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:176) ~[launchwrapper-1.12.jar:?]

at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_77]

at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_77]

at java.lang.Class.forName0(Native Method) ~[?:1.8.0_77]

at java.lang.Class.forName(Class.java:348) ~[?:1.8.0_77]

at net.minecraftforge.fml.relauncher.CoreModManager$FMLPluginWrapper.injectIntoClassLoader(CoreModManager.java:149) ~[forgeSrc-1.8.9-11.15.1.1722.jar:?]

... 8 more

Caused by: java.lang.IllegalArgumentException

at org.objectweb.asm.ClassVisitor.<init>(Unknown Source) ~[asm-all-4.2.jar:4.2]

at org.objectweb.asm.ClassVisitor.<init>(Unknown Source) ~[asm-all-4.2.jar:4.2]

at net.minecraftforge.fml.common.asm.transformers.BlamingTransformer$VersionVisitor.<init>(BlamingTransformer.java:49) ~[forgeSrc-1.8.9-11.15.1.1722.jar:?]

at net.minecraftforge.fml.common.asm.transformers.BlamingTransformer.transform(BlamingTransformer.java:33) ~[forgeSrc-1.8.9-11.15.1.1722.jar:?]

at net.minecraftforge.fml.common.asm.ASMTransformerWrapper$TransformerWrapper.transform(ASMTransformerWrapper.java:230) ~[forgeSrc-1.8.9-11.15.1.1722.jar:?]

at net.minecraft.launchwrapper.LaunchClassLoader.runTransformers(LaunchClassLoader.java:279) ~[launchwrapper-1.12.jar:?]

at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:176) ~[launchwrapper-1.12.jar:?]

at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_77]

at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_77]

at java.lang.Class.forName0(Native Method) ~[?:1.8.0_77]

at java.lang.Class.forName(Class.java:348) ~[?:1.8.0_77]

at net.minecraftforge.fml.relauncher.CoreModManager$FMLPluginWrapper.injectIntoClassLoader(CoreModManager.java:149) ~[forgeSrc-1.8.9-11.15.1.1722.jar:?]

... 8 more

[16:32:18] [main/INFO] [sTDERR/]: [java.lang.ThreadGroup:uncaughtException:1052]: java.lang.reflect.InvocationTargetException

[16:32:18] [main/INFO] [sTDERR/]: [java.lang.ThreadGroup:uncaughtException:1052]: at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

[16:32:18] [main/INFO] [sTDERR/]: [java.lang.ThreadGroup:uncaughtException:1052]: at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

[16:32:18] [main/INFO] [sTDERR/]: [java.lang.ThreadGroup:uncaughtException:1052]: at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

[16:32:18] [main/INFO] [sTDERR/]: [java.lang.ThreadGroup:uncaughtException:1052]: at java.lang.reflect.Method.invoke(Method.java:498)

[16:32:18] [main/INFO] [sTDERR/]: [java.lang.ThreadGroup:uncaughtException:1052]: at net.minecraftforge.gradle.GradleStartCommon.launch(GradleStartCommon.java:97)

[16:32:18] [main/INFO] [sTDERR/]: [java.lang.ThreadGroup:uncaughtException:1052]: at GradleStart.main(GradleStart.java:26)

[16:32:18] [main/INFO] [sTDERR/]: [java.lang.ThreadGroup:uncaughtException:1061]: Caused by: net.minecraftforge.fml.relauncher.FMLSecurityManager$ExitTrappedException

[16:32:18] [main/INFO] [sTDERR/]: [java.lang.ThreadGroup:uncaughtException:1061]: at net.minecraftforge.fml.relauncher.FMLSecurityManager.checkPermission(FMLSecurityManager.java:30)

[16:32:18] [main/INFO] [sTDERR/]: [java.lang.ThreadGroup:uncaughtException:1061]: at java.lang.SecurityManager.checkExit(SecurityManager.java:761)

[16:32:18] [main/INFO] [sTDERR/]: [java.lang.ThreadGroup:uncaughtException:1061]: at java.lang.Runtime.exit(Runtime.java:107)

[16:32:18] [main/INFO] [sTDERR/]: [java.lang.ThreadGroup:uncaughtException:1061]: at java.lang.System.exit(System.java:971)

[16:32:18] [main/INFO] [sTDERR/]: [java.lang.ThreadGroup:uncaughtException:1061]: at net.minecraft.launchwrapper.Launch.launch(Launch.java:138)

[16:32:18] [main/INFO] [sTDERR/]: [java.lang.ThreadGroup:uncaughtException:1061]: at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

[16:32:18] [main/INFO] [sTDERR/]: [java.lang.ThreadGroup:uncaughtException:1061]: ... 6 more

 

 

 

I simply would like to know what the hell causes this error (under normal circumstances). The dependency in question isn't even listed in it.

What dependency is it?

 

Well, as you might already know, the mod I'm working on is one that attempts to integrate the Clojure programming language into Minecraft. It's working rather well so far, and in order to make certain tasks far simpler (networking, mainly), I wanted to include the powerful core.async library in the project (simply put, core.async allows you to write multithreaded-looking processes, while only using a simple thread. Apparently it does this by transforming your code into a state machine. Pretty powerful stuff).

 

So, I've tried multiple times to include it, but keep running into this error. There is no mention of it in the error, and it's confusing as heck as I have no idea what Forge is doing at that point.

 

BTW, if I DO manage to include it, I could potentially reduce simple networking to maybe like 3 or 4 lines of code + whatever you're wanting to do. So I'd really like to get this thing working if possible.

Yep, just what I suspected. core.async depends on tools.analyzer.jvm which depends on version 4.2 of ASM. Forge depends on version 5. The IllegalArgumentException you are getting is because forge is passing in the ASM5 version constant which causes ASM4 to say "I don't support that API".

 

Ah, this helps a lot. Is there some sort of gradle magic I can use to resolve this, or will I have to go into tools.analyzer.jvm and manually change the dependency?

 

No really though, thank you, I never would have thought of that at all.

I am not sure of the inner workings of gradle, but if you can get it to use ASM5 instead of ASM4 everything should just work™, since ASM should be backwards compatible.

However I am not sure how to achieve that.

 

ah, thanks. I'm not sure either. I'll probably have to either bug the people at Clojure about it, or create a custom version, probably. I might look for other options though. Again, thanks!

This looks promising: https://docs.gradle.org/current/dsl/org.gradle.api.artifacts.ResolutionStrategy.html

 

Oh, that's nice! I'll have to test this.

Got it to work! The following addition to gradle fixed it:

 

 

 

shade('org.clojure:core.async:0.2.382')

{

exclude group: 'org.ow2.asm'

}

 

 

 

Thanks!