Why do I get compiler error in this code ```@Suppr...

# codereview

[Eugen Martynov]

Why do I get compiler error in this code

@Suppress("UNCHECKED_CAST")
fun MutableMap<Any, Any>.translate(translations: Map<Int, String>) {
    forEach { (key, value) ->
        when (value) {
            is String -> put(key, translations[value.hashCode()]!!)
            is MutableMap<*, *> -> (value as MutableMap<Any, Any>).translate(translations)
            is MutableList<*> -> (value as MutableList<Any>).translate(translations)
            else -> {
                // nothing
            }
        }
    }
}

@Suppress("UNCHECKED_CAST")
fun MutableList<Any>.translate(translations: Map<Int, String>) = forEachIndexed { index, value ->
    when (value) {
        is String -> set(index, translations[value.hashCode()]!!)
        is MutableMap<*, *> -> (value as MutableMap<Any, Any>).translate(translations)
        is MutableList<*> -> (value as MutableList<Any>).translate(translations) <-- here is error on cast: type checking has run into a recursive problem. Easiest workaround: specify types of your declarations explicitly
        else -> {
            // nothing
        }
    }
}