| /* | |
| * Copyright 2010-2020 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license | |
| * that can be found in the LICENSE file. | |
| */ | |
| // WITH_STDLIB | |
| import kotlin.test.* | |
| class A { | |
| var f: A? = null | |
| } | |
| fun foo(a: A, k: Int): A { | |
| return if (k == 0) a else foo(a.f!!, k - 1) | |
| } | |
| fun box(): String { | |
| val a = A() | |
| val a2 = A() | |
| a.f = a2 | |
| assertEquals(a2, foo(a, 1)) | |
| return "OK" | |
| } |