compiler/testData/diagnostics/testsWithStdLib/hashSet.kt

// RUN_PIPELINE_TILL: CODEGEN
import java.util.HashSet

val a: MutableSet<String>? = HashSet()

var b: MutableSet<String>? = null
    set(_) {
        field = HashSet()
    }

var <T> MutableSet<T>.d: T? get() = null
    set(_) {}

fun <T> produce(): T = TODO()

fun foo() {
    var c: MutableSet<String>? = null
    c = HashSet()

    c<!UNNECESSARY_NOT_NULL_ASSERTION!>!!<!>.d = produce()
}

/* GENERATED_FIR_TAGS: assignment, checkNotNullCall, functionDeclaration, getter, javaFunction, localProperty,
nullableType, propertyDeclaration, propertyWithExtensionReceiver, setter, smartcast, typeParameter */