| // IGNORE_BACKEND: JVM | |
| // IGNORE_BACKEND_FIR: JVM_IR | |
| // FIR status: don't support legacy feature. UNINITIALIZED_PARAMETER y. See KT-49800 | |
| tailrec fun foo(x: () -> String? = { y }, y: String = "fail"): String? { | |
| if (y == "start") | |
| return foo() | |
| return x() | |
| } | |
| fun box() = foo(y = "start") ?: "OK" |