I have a DisposableEffect which registers an eventlistener, and disposes of it again. But it appears that I am not allowed to update MutableState variables inside this event listener? I get compiler errors:

var editMode by remember { mutableStateOf(false) }

DisposableEffect(Unit) {
        val handler : EventListener = object : EventListener {
            override fun handleEvent(event: Event) {
                if (event.target != null) {
                    //editMode = false <- compiler error when I uncomment this
                }
            }
        }

        document.body?.addEventListener("click", handler)
        onDispose {
            document.body?.removeEventListener("click", handler)
        }
    }

And the last part of the stack-trace:

java.lang.IllegalStateException: Validation failed in file Components.kt
	at org.jetbrains.kotlin.backend.common.IrValidator.error(IrValidator.kt:83)
	at org.jetbrains.kotlin.backend.common.IrValidator.access$error(IrValidator.kt:61)

EDIT: It appears to work when using a lambda function as argument to the eventListener and not an object.

Seems like a compiler bug to me, probably worth reporting to the GitHub repo

Yes, I will do that