kotlin-fork/compiler/testData/codegen/box/functions/kt1649_1.kt

// IGNORE_BACKEND: JVM_IR
interface A {
    val method : (() -> Unit)?
}

fun test(a : A) {
    if (a.method != null) {
        a.method!!()
    }
}

class B : A {
    override val method = { }
}

fun box(): String {
    test(B())
    return "OK"
}