kotlin-fork/compiler/testData/diagnostics/tests/smartCasts/kt6819.kt

public fun test(o: String?): Boolean {
    return when {
        // Data flow info should propagate from o == null to o.length
        o == null<!COMMA_IN_WHEN_CONDITION_WITHOUT_ARGUMENT!>,<!> <!DEBUG_INFO_SMARTCAST!>o<!>.length == 0 -> false
        else -> true
    }
}