// DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_VALUE -VARIABLE_WITH_REDUNDANT_INITIALIZER
// SKIP_TXT

/*
 * KOTLIN DIAGNOSTICS NOT LINKED SPEC TEST (NEGATIVE)
 *
 * SECTIONS: dfa
 * NUMBER: 33
 * DESCRIPTION: Raw data flow analysis test
 * HELPERS: classes, objects, typealiases, functions, enumClasses, interfaces, sealedClasses
 */

// TESTCASE NUMBER: 1, 2, 3, 4, 5
fun nullableStringArg(number: String?) {}

/*
 * TESTCASE NUMBER: 1
 * UNEXPECTED BEHAVIOUR
 * ISSUES: KT-25453
 */
fun case_1(x: Int?) {
    if (x == null) {
        nullableStringArg(<!DEBUG_INFO_EXPRESSION_TYPE("kotlin.Nothing?")!>x<!>)
    }
}

/*
 * TESTCASE NUMBER: 2
 * UNEXPECTED BEHAVIOUR
 * ISSUES: KT-25453
 */
fun case_2(x: Int?, y: Nothing?) {
    if (x == y) {
        nullableStringArg(<!DEBUG_INFO_EXPRESSION_TYPE("kotlin.Nothing?")!>x<!>)
    }
}

/*
 * TESTCASE NUMBER: 3
 * UNEXPECTED BEHAVIOUR
 * ISSUES: KT-25453
 */
fun case_3(x: Int?) {
    if (x == null) {
        nullableStringArg(<!DEBUG_INFO_EXPRESSION_TYPE("kotlin.Nothing?")!>x<!>)
    }
}

/*
 * TESTCASE NUMBER: 4
 * UNEXPECTED BEHAVIOUR
 * ISSUES: KT-25453
 */
fun case_4(x: Int?) {
    if (x == null) {
        nullableStringArg(<!DEBUG_INFO_EXPRESSION_TYPE("kotlin.Nothing?")!>x<!>)
    }
}

/*
 * TESTCASE NUMBER: 5
 * UNEXPECTED BEHAVIOUR
 * ISSUES: KT-25453
 */
fun case_5(x: Int?) {
    if (x == null) {
        var y = x
        nullableStringArg(<!DEBUG_INFO_EXPRESSION_TYPE("kotlin.Nothing?")!>y<!>)
    }
}
