Compiler plugin question - what does this error me...

# compiler

[natario1]

Compiler plugin question - what does this error mean?

e: java.lang.UnsupportedOperationException: VALUE_PARAMETER INSTANCE_RECEIVER name:<this> type:my.sample.ProblematicCallbackImpl
        at org.jetbrains.kotlin.backend.konan.llvm.CodeGeneratorVisitor$TopLevelCodeContext.unsupported(IrToBitcode.kt:253)

I identified the offending code (irGet(thisClass.thisReceiver!!)) but not a solution. I’m using the receiver to call a superclass function. I tried using superClass.thisReceiver!! instead, but that creates a different error.

[Iaroslav Postovalov]

On what phase do you add such code? AFAIK, Kotlin/Native IR lowering replaces getting thisReceiver with getting a normal variable.

[natario1]

In IrGenerationExtension, before lowerings I suppose. I "solved" it by getting the receiver from elsewhere (the function being called) but I'd like to understand what's happening, K/N errors are quite hard to decode