8 async fn a(n: u32, mut vec: A) {
12 async fn b(n: u32, ref mut vec: A) {
16 async fn c(ref vec: A) {
20 async fn d((a, mut b): (A, A)) {
24 async fn f((ref mut a, ref b): (A, A)) {}
26 async fn g(((ref a, ref mut b), (ref mut c, ref d)): ((A, A), (A, A))) {}