4 * This is a regression test for a bug in LLVM, fixed in upstream r179587,
5 * where the switch instructions generated for destructuring enums
6 * represented with nullable pointers could be misoptimized in some cases.
9 enum List<X> { Nil, Cons(X, #[allow(unused_tuple_struct_fields)] Box<List<X>>) }
11 match List::Cons(10, Box::new(List::Nil)) {
12 List::Cons(10, _) => {}