[ERROR] Unexpected internal compiler error | BytecodeSignatureMaker.java:59 | at com.google.gwt.dev.Compiler.main(Compiler.java:113)

[Michael Conrad]

Trying to update to gwt 2.10.0, have it mostly figured out, but I'm getting the following stack trace.

Any suggestions on what I need to look for?

I've already did the exclude module's thing on multiple dependencies to keep gwt 2.8 stuff out of the classpath. There is no GWT servlet stuff.

Using Gradle, JDK 17, Linux, IntelliJU

plugins {
    id "java"
    id "war"
    id "org.wisepersist.gwt"
    id "org.gretty"
}

> Task :compileGwt
Compiling module com.newsrx.butter.Butter
[ERROR] Unexpected internal compiler error
java.lang.IllegalArgumentException
        at org.objectweb.asm.ClassVisitor.<init>(Unknown Source)
        at org.objectweb.asm.ClassVisitor.<init>(Unknown Source)
        at com.google.gwt.dev.javac.BytecodeSignatureMaker$CompileDependencyVisitor.<init>(BytecodeSignatureMaker.java:59)
        at com.google.gwt.dev.javac.BytecodeSignatureMaker.visitCompileDependenciesInBytecode(BytecodeSignatureMaker.java:227)
        at com.google.gwt.dev.javac.BytecodeSignatureMaker.getCompileDependencySignature(BytecodeSignatureMaker.java:209)
        at com.google.gwt.dev.javac.CompiledClass.getSignatureHash(CompiledClass.java:166)
        at com.google.gwt.dev.javac.Dependencies$Ref.<init>(Dependencies.java:41)
        at com.google.gwt.dev.javac.Dependencies$Ref.<init>(Dependencies.java:36)
        at com.google.gwt.dev.javac.Dependencies.resolve(Dependencies.java:100)
        at com.google.gwt.dev.javac.CompilationStateBuilder$CompileMoreLater.compile(CompilationStateBuilder.java:349)
        at com.google.gwt.dev.javac.CompilationStateBuilder.doBuildFrom(CompilationStateBuilder.java:532)
        at com.google.gwt.dev.javac.CompilationStateBuilder.buildFrom(CompilationStateBuilder.java:464)
        at com.google.gwt.dev.cfg.ModuleDef.getCompilationState(ModuleDef.java:423)
        at com.google.gwt.dev.Precompile.precompile(Precompile.java:210)
        at com.google.gwt.dev.Precompile.precompile(Precompile.java:190)
        at com.google.gwt.dev.Precompile.precompile(Precompile.java:131)
        at com.google.gwt.dev.Compiler.compile(Compiler.java:192)
        at com.google.gwt.dev.Compiler.compile(Compiler.java:143)
        at com.google.gwt.dev.Compiler.compile(Compiler.java:132)
        at com.google.gwt.dev.Compiler$1.run(Compiler.java:110)
        at com.google.gwt.dev.CompileTaskRunner.doRun(CompileTaskRunner.java:55)
        at com.google.gwt.dev.CompileTaskRunner.runWithAppropriateLogger(CompileTaskRunner.java:50)
        at com.google.gwt.dev.Compiler.main(Compiler.java:113)


Dependency graph attached.

[Jens]

GWT (gwt-dev) depends on ASM 9.2 which supports up to Java 18. On your compile classpath you have gwt-websockets which depends on ASM 5.x. Seems like that ASM version is used during GWT compilation. 

ASM's ClassVisitor constructor checks the byte code version of the class file and if it is too high then this exception will be thrown.

-- J.

[Michael Conrad]

Thanks for the assistance.

After poking around a bit, I removed the dependency and switched to using Element2 for websock work.

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