1 error: future cannot be sent between threads safely
2 --> $DIR/issue-68112.rs:37:18
4 LL | require_send(send_fut);
5 | ^^^^^^^^ future created by async block is not `Send`
7 = help: the trait `Sync` is not implemented for `RefCell<i32>`
8 note: future is not `Send` as it awaits another future which is not `Send`
9 --> $DIR/issue-68112.rs:34:17
11 LL | let _ = non_send_fut.await;
12 | ^^^^^^^^^^^^ await occurs here on type `impl Future<Output = Arc<RefCell<i32>>>`, which is not `Send`
13 note: required by a bound in `require_send`
14 --> $DIR/issue-68112.rs:14:25
16 LL | fn require_send(_: impl Send) {}
17 | ^^^^ required by this bound in `require_send`
19 error: future cannot be sent between threads safely
20 --> $DIR/issue-68112.rs:46:18
22 LL | require_send(send_fut);
23 | ^^^^^^^^ future created by async block is not `Send`
25 = help: the trait `Sync` is not implemented for `RefCell<i32>`
26 note: future is not `Send` as it awaits another future which is not `Send`
27 --> $DIR/issue-68112.rs:43:17
29 LL | let _ = make_non_send_future1().await;
30 | ^^^^^^^^^^^^^^^^^^^^^^^ await occurs here on type `impl Future<Output = Arc<RefCell<i32>>>`, which is not `Send`
31 note: required by a bound in `require_send`
32 --> $DIR/issue-68112.rs:14:25
34 LL | fn require_send(_: impl Send) {}
35 | ^^^^ required by this bound in `require_send`
37 error[E0277]: `RefCell<i32>` cannot be shared between threads safely
38 --> $DIR/issue-68112.rs:65:18
40 LL | require_send(send_fut);
41 | ------------ ^^^^^^^^ `RefCell<i32>` cannot be shared between threads safely
43 | required by a bound introduced by this call
45 = help: the trait `Sync` is not implemented for `RefCell<i32>`
46 = note: required for `Arc<RefCell<i32>>` to implement `Send`
47 note: required because it's used within this `async fn` body
48 --> $DIR/issue-68112.rs:50:31
50 LL | async fn ready2<T>(t: T) -> T {
51 | _______________________________^
55 note: required because it appears within the type `impl Future<Output = Arc<RefCell<i32>>>`
56 --> $DIR/issue-68112.rs:53:31
58 LL | fn make_non_send_future2() -> impl Future<Output = Arc<RefCell<i32>>> {
59 | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
60 = note: required because it captures the following types: `ResumeTy`, `impl Future<Output = Arc<RefCell<i32>>>`, `()`, `Ready<i32>`
61 note: required because it's used within this `async` block
62 --> $DIR/issue-68112.rs:60:20
64 LL | let send_fut = async {
65 | ____________________^
66 LL | | let non_send_fut = make_non_send_future2();
67 LL | | let _ = non_send_fut.await;
68 LL | | ready(0).await;
71 note: required by a bound in `require_send`
72 --> $DIR/issue-68112.rs:14:25
74 LL | fn require_send(_: impl Send) {}
75 | ^^^^ required by this bound in `require_send`
77 error: aborting due to 3 previous errors
79 For more information about this error, try `rustc --explain E0277`.