False positive in ThrowsCount rule

[t-kameyama]

import java.io.IOException

fun foo(x: Int) {
    fun bar(x: Int) {
        when (x) {
            1 -> throw IOException()
            2 -> throw IOException()
            3 -> throw IOException()
        }
    }
    return bar(x)
}

foo at line 3 should not be reported as well as ReturnCount rule.