error: future cannot be sent between threads safely --> $DIR/future_not_send.rs:8:62 | LL | async fn private_future(rc: Rc<[u8]>, cell: &Cell) -> bool { | ^^^^ future returned by `private_future` is not `Send` | = note: `-D clippy::future-not-send` implied by `-D warnings` note: future is not `Send` as this value is used across an await --> $DIR/future_not_send.rs:9:5 | LL | async fn private_future(rc: Rc<[u8]>, cell: &Cell) -> bool { | -- has type `std::rc::Rc<[u8]>` which is not `Send` LL | async { true }.await | ^^^^^^^^^^^^^^^^^^^^ await occurs here, with `rc` maybe used later LL | } | - `rc` is later dropped here = note: `std::rc::Rc<[u8]>` doesn't implement `std::marker::Send` note: future is not `Send` as this value is used across an await --> $DIR/future_not_send.rs:9:5 | LL | async fn private_future(rc: Rc<[u8]>, cell: &Cell) -> bool { | ---- has type `&std::cell::Cell` which is not `Send` LL | async { true }.await | ^^^^^^^^^^^^^^^^^^^^ await occurs here, with `cell` maybe used later LL | } | - `cell` is later dropped here = note: `std::cell::Cell` doesn't implement `std::marker::Sync` error: future cannot be sent between threads safely --> $DIR/future_not_send.rs:12:42 | LL | pub async fn public_future(rc: Rc<[u8]>) { | ^ future returned by `public_future` is not `Send` | note: future is not `Send` as this value is used across an await --> $DIR/future_not_send.rs:13:5 | LL | pub async fn public_future(rc: Rc<[u8]>) { | -- has type `std::rc::Rc<[u8]>` which is not `Send` LL | async { true }.await; | ^^^^^^^^^^^^^^^^^^^^ await occurs here, with `rc` maybe used later LL | } | - `rc` is later dropped here = note: `std::rc::Rc<[u8]>` doesn't implement `std::marker::Send` error: future cannot be sent between threads safely --> $DIR/future_not_send.rs:20:63 | LL | async fn private_future2(rc: Rc<[u8]>, cell: &Cell) -> bool { | ^^^^ | = note: `std::rc::Rc<[u8]>` doesn't implement `std::marker::Send` = note: `std::cell::Cell` doesn't implement `std::marker::Sync` error: future cannot be sent between threads safely --> $DIR/future_not_send.rs:24:43 | LL | pub async fn public_future2(rc: Rc<[u8]>) {} | ^ | = note: `std::rc::Rc<[u8]>` doesn't implement `std::marker::Send` error: future cannot be sent between threads safely --> $DIR/future_not_send.rs:35:39 | LL | async fn private_future(&self) -> usize { | ^^^^^ future returned by `private_future` is not `Send` | note: future is not `Send` as this value is used across an await --> $DIR/future_not_send.rs:36:9 | LL | async fn private_future(&self) -> usize { | ----- has type `&Dummy` which is not `Send` LL | async { true }.await; | ^^^^^^^^^^^^^^^^^^^^ await occurs here, with `&self` maybe used later LL | self.rc.len() LL | } | - `&self` is later dropped here = note: `std::rc::Rc<[u8]>` doesn't implement `std::marker::Sync` error: future cannot be sent between threads safely --> $DIR/future_not_send.rs:40:39 | LL | pub async fn public_future(&self) { | ^ future returned by `public_future` is not `Send` | note: future is not `Send` as this value is used across an await --> $DIR/future_not_send.rs:41:9 | LL | pub async fn public_future(&self) { | ----- has type `&Dummy` which is not `Send` LL | self.private_future().await; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ await occurs here, with `&self` maybe used later LL | } | - `&self` is later dropped here = note: `std::rc::Rc<[u8]>` doesn't implement `std::marker::Sync` error: future cannot be sent between threads safely --> $DIR/future_not_send.rs:50:37 | LL | async fn generic_future(t: T) -> T | ^ future returned by `generic_future` is not `Send` | note: future is not `Send` as this value is used across an await --> $DIR/future_not_send.rs:55:5 | LL | let rt = &t; | -- has type `&T` which is not `Send` LL | async { true }.await; | ^^^^^^^^^^^^^^^^^^^^ await occurs here, with `rt` maybe used later LL | t LL | } | - `rt` is later dropped here = note: `T` doesn't implement `std::marker::Sync` error: future cannot be sent between threads safely --> $DIR/future_not_send.rs:66:34 | LL | async fn unclear_future(t: T) {} | ^ | = note: `T` doesn't implement `std::marker::Send` error: aborting due to 8 previous errors