I am having issue with building 4.1.1:

./gradlew publishToMavenLocal -PSNAPSHOT=true

results:

> Task :compileKotlinJsIr
e: java.lang.IllegalStateException: Unsupported operation
        at org.jetbrains.kotlin.backend.common.serialization.IrModuleDeserializer.referenceSimpleFunctionByLocalSignature(IrModuleDeserializer.kt:37)

Any idea? It works in 4.1.0

Every time? I see such errors from time to time, but I just run the build again and it works.

I'll try it again.

If you find a way to get this bug repetitively, it would be probably a good idea to fill Kotlin YT issue 🙂

This is a known bug in the Kotlin compiler. I have filled a bug some time ago: "gradle clean" solves the issue