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

// !WITH_NEW_INFERENCE
class MyClass

operator fun MyClass.inc(): MyClass { <!OI;UNREACHABLE_CODE!>return<!> null!! }

public fun box() : MyClass? {
    var i : MyClass?
    i = MyClass()
    // type of j can be inferred as MyClass()
    var j = <!DEBUG_INFO_SMARTCAST!>i<!>++
    <!DEBUG_INFO_SMARTCAST!>j<!>.hashCode()
    return i
}