Kotlin 2.4.0‑Beta1 breaks Koin compiler plugin: FirExtensionRegistrarAdapter cast error

[ayitinya]

Testing with Kotlin 2.4.0-Beta1, no changes made to project setup from Kotlin 2.3.20.
I get the attached error when trying to run any target

Kotlin = "2.4.0-Beta1"
koin-plugin = "1.0.0-RC1" & "0.6.2"
koin = "4.2.1"

kotlin version: 2.4.0-Beta1
error message: java.lang.ClassCastException: class org.jetbrains.kotlin.fir.extensions.FirExtensionRegistrarAdapter$Companion cannot be cast to class org.jetbrains.kotlin.extensions.ProjectExtensionDescriptor (org.jetbrains.kotlin.fir.extensions.FirExtensionRegistrarAdapter$Companion and org.jetbrains.kotlin.extensions.ProjectExtensionDescriptor are in unnamed module of loader 'app')
	at org.koin.compiler.plugin.KoinPluginComponentRegistrar.registerExtensions(KoinPluginComponentRegistrar.kt:189)
	at org.jetbrains.kotlin.cli.jvm.compiler.KotlinCoreEnvironment$Companion.registerExtensionsFromPlugins$cli_base(KotlinCoreEnvironment.kt:758)
	at org.jetbrains.kotlin.cli.jvm.compiler.KotlinCoreEnvironment$ProjectEnvironment.registerExtensionsFromPlugins(KotlinCoreEnvironment.kt:182)
	at org.jetbrains.kotlin.cli.jvm.compiler.KotlinCoreEnvironment$Companion.configureProjectEnvironment(KotlinCoreEnvironment.kt:644)
	at org.jetbrains.kotlin.cli.jvm.compiler.KotlinCoreEnvironment.<init>(KotlinCoreEnvironment.kt:214)
	at org.jetbrains.kotlin.cli.jvm.compiler.KotlinCoreEnvironment.<init>(KotlinCoreEnvironment.kt)
	at org.jetbrains.kotlin.cli.jvm.compiler.KotlinCoreEnvironment$Companion.createForProduction(KotlinCoreEnvironment.kt:431)
	at org.jetbrains.kotlin.cli.pipeline.web.WebFrontendPipelinePhase.executePhase(WebFrontendPipelinePhase.kt:53)
	at org.jetbrains.kotlin.cli.pipeline.web.WebFrontendPipelinePhase.executePhase(WebFrontendPipelinePhase.kt:46)
	at org.jetbrains.kotlin.cli.pipeline.PipelinePhase.phaseBody(PipelinePhase.kt:63)
	at org.jetbrains.kotlin.cli.pipeline.PipelinePhase.phaseBody(PipelinePhase.kt:53)
	at org.jetbrains.kotlin.config.phaser.NamedCompilerPhase.invoke(CompilerPhase.kt:102)
	at org.jetbrains.kotlin.backend.common.phaser.CompositePhase.invoke(PhaseBuilders.kt:22)
	at org.jetbrains.kotlin.config.phaser.CompilerPhaseKt.invokeToplevel(CompilerPhase.kt:53)
	at org.jetbrains.kotlin.cli.pipeline.AbstractCliPipeline.runPhasedPipeline(AbstractCliPipeline.kt:113)
	at org.jetbrains.kotlin.cli.pipeline.AbstractCliPipeline.execute(AbstractCliPipeline.kt:70)
	at org.jetbrains.kotlin.cli.js.K2JSCompiler.doExecutePhased(K2JSCompiler.kt:41)
	at org.jetbrains.kotlin.cli.js.K2JSCompiler.doExecutePhased(K2JSCompiler.kt:28)
	at org.jetbrains.kotlin.cli.common.CLICompiler.execImpl(CLICompiler.kt:94)
	at org.jetbrains.kotlin.cli.common.CLICompiler.exec(CLICompiler.kt:366)
	at org.jetbrains.kotlin.daemon.CompileServiceImpl.compile(CompileServiceImpl.kt:1898)
	at org.jetbrains.kotlin.daemon.CompileServiceImpl.compile(CompileServiceImpl.kt:905)
	at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(Unknown Source)
	at java.base/java.lang.reflect.Method.invoke(Unknown Source)
	at java.rmi/sun.rmi.server.UnicastServerRef.dispatch(Unknown Source)
	at java.rmi/sun.rmi.transport.Transport$1.run(Unknown Source)
	at java.rmi/sun.rmi.transport.Transport$1.run(Unknown Source)
	at java.base/java.security.AccessController.doPrivileged(Unknown Source)
	at java.rmi/sun.rmi.transport.Transport.serviceCall(Unknown Source)
	at java.rmi/sun.rmi.transport.tcp.TCPTransport.handleMessages(Unknown Source)
	at java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(Unknown Source)
	at java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$run$0(Unknown Source)
	at java.base/java.security.AccessController.doPrivileged(Unknown Source)
	at java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(Unknown Source)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
	at java.base/java.lang.Thread.run(Unknown Source)

[dropbeardevs]

I'm also getting this issue. If I get time I'll want to take a look at maybe seeing if there's a fix or workaround.

[rjaros]

Hello. I'm also affected. When can we expect a fix?