compiler/testData/diagnostics/testsWithStdLib/smartcasts/letChangesToNotNull.kt

// FIR_IDENTICAL
// KT-9051: Allow smart cast for captured variables if they are not modified

fun foo(y: String?) {
    var x: String? = null
    y?.let { x = it }
    x<!UNSAFE_CALL!>.<!>length // Smart cast is not possible
}