open class SuperClass {
    override operator fun equals(other: Any?): Boolean {
        return super.equals(other)
    }
}

class ExtendedClass : SuperClass() {
    override operator fun equals(other: Any?): Boolean {
        return super.equals(other)
    }
}

Error:(9, 14) Kotlin: 'operator' modifier is inapplicable on this function: must override ''equals()'' in Any

so apparently this doesn't compile unless I remove the

operator

keyword from `ExtendedClass`' implementation is this intended behavior? this seems... a bit weird and unintuitive to me

That's weird, I'd report this as a bug on YouTrack.

sure, will do, thanks

(and link it here, now I'm interested as well)

there you go: https://youtrack.jetbrains.com/issue/KT-33132