kotlin-fork/compiler/testData/diagnostics/tests/smartCasts/varnotnull/prefixNullableIncrement.fir.kt

operator fun Int?.inc(): Int? { return this }

public fun box(arg: Int?) : Int? {
    var i = arg
    var j = ++i
    j.<!INAPPLICABLE_CANDIDATE!>toInt<!>()
    return ++j
}