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

// !DIAGNOSTICS: -UNUSED_PARAMETER
fun foo(arg: Int?) {
    run {
        var x = arg
        while (x != null) {
            x = x.hashCode()
            if (x == 0) x = null
        }
    }
}