just updated one of our kotlin-js / fritz2 project...

# k2-adopters

[Jilles van Gurp]

just updated one of our kotlin-js / fritz2 projects to 1.9.20 and enabled k2. It crashes with this exception:

e: java.lang.IllegalStateException: Unknown classifier kind null
at org.jetbrains.kotlin.fir.backend.generators.DataClassMembersGenerator$MyDataClassMethodsGenerator$irDataClassMembersGenerator$1.getHashCodeFunctionInfo(DataClassMembersGenerator.kt:132)
at org.jetbrains.kotlin.ir.util.DataClassMembersGenerator.getHashCodeOf(DataClassMembersGenerator.kt:241)
at org.jetbrains.kotlin.ir.util.DataClassMembersGenerator.getHashCodeOf(DataClassMembersGenerator.kt:238)
at org.jetbrains.kotlin.ir.util.DataClassMembersGenerator$MemberFunctionBuilder.getHashCodeOfProperty(DataClassMembersGenerator.kt:195)
at org.jetbrains.kotlin.ir.util.DataClassMembersGenerator$MemberFunctionBuilder.generateHashCodeMethodBody(DataClassMembersGenerator.kt:181)
at org.jetbrains.kotlin.ir.util.IrBasedDataClassMembersGenerator.generateHashCodeMethod(DataClassMembersGenerator.kt:308)
at org.jetbrains.kotlin.fir.backend.generators.DataClassMembersGenerator$MyDataClassMethodsGenerator.generate(DataClassMembersGenerator.kt:194)
at org.jetbrains.kotlin.fir.backend.generators.DataClassMembersGenerator.generateDataClassMembers(DataClassMembersGenerator.kt:59)
at org.jetbrains.kotlin.fir.backend.Fir2IrConverter.processClassMembers$fir2ir(Fir2IrConverter.kt:231)
at org.jetbrains.kotlin.fir.backend.Fir2IrConverter.processMemberDeclaration(Fir2IrConverter.kt:426)
at org.jetbrains.kotlin.fir.backend.Fir2IrConverter.processFileAndClassMembers(Fir2IrConverter.kt:182)
at org.jetbrains.kotlin.fir.backend.Fir2IrConverter.runSourcesConversion(Fir2IrConverter.kt:86)
at org.jetbrains.kotlin.fir.backend.Fir2IrConverter.access$runSourcesConversion(Fir2IrConverter.kt:53)
at org.jetbrains.kotlin.fir.backend.Fir2IrConverter$Companion.createModuleFragmentWithSignaturesIfNeeded(Fir2IrConverter.kt:587)
at org.jetbrains.kotlin.fir.pipeline.ModuleCompilerAnalyzedOutput.convertToIr(convertToIr.kt:48)
at org.jetbrains.kotlin.fir.pipeline.ConvertToIrKt.convertToIrAndActualize(convertToIr.kt:145)
at org.jetbrains.kotlin.cli.js.klib.CompilerPipelineKt.transformFirToIr(compilerPipeline.kt:234)
at org.jetbrains.kotlin.cli.js.K2JsIrCompiler.processSourceModuleWithK2(K2JsIrCompiler.kt:537)
at org.jetbrains.kotlin.cli.js.K2JsIrCompiler.doExecute(K2JsIrCompiler.kt:271)
at org.jetbrains.kotlin.cli.js.K2JSCompiler.doExecute(K2JSCompiler.java:181)
at org.jetbrains.kotlin.cli.js.K2JSCompiler.doExecute(K2JSCompiler.java:72)
at org.jetbrains.kotlin.cli.common.CLICompiler.execImpl(CLICompiler.kt:104)
at org.jetbrains.kotlin.cli.common.CLICompiler.execImpl(CLICompiler.kt:48)
at org.jetbrains.kotlin.cli.common.CLITool.exec(CLITool.kt:101)
at org.jetbrains.kotlin.incremental.IncrementalJsCompilerRunner.runCompiler(IncrementalJsCompilerRunner.kt:218)
at org.jetbrains.kotlin.incremental.IncrementalJsCompilerRunner.runCompiler(IncrementalJsCompilerRunner.kt:86)
at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.doCompile(IncrementalCompilerRunner.kt:477)
at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.compileImpl(IncrementalCompilerRunner.kt:400)
at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.compileNonIncrementally(IncrementalCompilerRunner.kt:281)
at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.compile(IncrementalCompilerRunner.kt:125)
at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.compile$default(IncrementalCompilerRunner.kt:109)
at org.jetbrains.kotlin.daemon.CompileServiceImplBase.execJsIncrementalCompiler(CompileServiceImpl.kt:579)
at org.jetbrains.kotlin.daemon.CompileServiceImplBase.access$execJsIncrementalCompiler(CompileServiceImpl.kt:105)
at org.jetbrains.kotlin.daemon.CompileServiceImpl.compile(CompileServiceImpl.kt:1715)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:568)
at java.rmi/sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:360)
at java.rmi/sun.rmi.transport.Transport$1.run(Transport.java:200)
at java.rmi/sun.rmi.transport.Transport$1.run(Transport.java:197)
at java.base/java.security.AccessController.doPrivileged(AccessController.java:712)
at java.rmi/sun.rmi.transport.Transport.serviceCall(Transport.java:196)
at java.rmi/sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:587)
at java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:828)
at java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$run$0(TCPTransport.java:705)
at java.base/java.security.AccessController.doPrivileged(AccessController.java:399)
at java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:704)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
at java.base/java.lang.Thread.run(Thread.java:833)

Without k2 it works.

[dmitriy.novozhilov]

Could you please report an issue with some steps to reproduce?

[Jilles van Gurp]

I have no way to reproduce this other than setting k2 to true on this project.

[dmitriy.novozhilov]

Is this project is open-source by any chance?

[Jilles van Gurp]

no, it's our main app. Pretty large code base and no hint of which part of it is the problem.

[Jilles van Gurp]

I'll file a bug for the stack trace of course. Looks like something that shouldn't be happening in any case.

[Jilles van Gurp]

https://youtrack.jetbrains.com/issue/KT-63094/K2-exception-java.lang.IllegalStateException-Unknown-classifier-kind-null

[Jilles van Gurp]

Tracked down some more detail with @dmitriy.novozhilov

It looks like having properties of type dynamic in data classes is triggering this.

This is one of the offending classes:

data class Event(
    val type: String,
    val target: dynamic,
    val sourceTarget: dynamic,
    val propagatedFrom: dynamic,
    val layer: dynamic
)