// FIR_IDENTICAL
package a

class A {}

fun test(a1: A, a2: A) {
    val range = "island".."isle"

    a1<!UNRESOLVED_REFERENCE_WRONG_RECEIVER!>..<!>a2
}


public operator fun <T: Comparable<T>> T.rangeTo(that: T): ClosedRange<T> {
    throw UnsupportedOperationException()
}