rust-clippy/tests/ui/future_not_send.stderr

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error: future cannot be sent between threads safely
--> $DIR/future_not_send.rs:7:62
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|
LL | async fn private_future(rc: Rc<[u8]>, cell: &Cell<usize>) -> 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
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--> $DIR/future_not_send.rs:8:19
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|
LL | async fn private_future(rc: Rc<[u8]>, cell: &Cell<usize>) -> bool {
| -- has type `std::rc::Rc<[u8]>` which is not `Send`
LL | async { true }.await
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| ^^^^^^ await occurs here, with `rc` maybe used later
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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
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--> $DIR/future_not_send.rs:8:19
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|
LL | async fn private_future(rc: Rc<[u8]>, cell: &Cell<usize>) -> bool {
| ---- has type `&std::cell::Cell<usize>` which is not `Send`
LL | async { true }.await
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| ^^^^^^ await occurs here, with `cell` maybe used later
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LL | }
| - `cell` is later dropped here
= note: `std::cell::Cell<usize>` doesn't implement `std::marker::Sync`
error: future cannot be sent between threads safely
--> $DIR/future_not_send.rs:11:42
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|
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
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--> $DIR/future_not_send.rs:12:19
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|
LL | pub async fn public_future(rc: Rc<[u8]>) {
| -- has type `std::rc::Rc<[u8]>` which is not `Send`
LL | async { true }.await;
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| ^^^^^^ await occurs here, with `rc` maybe used later
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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:19:63
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|
LL | async fn private_future2(rc: Rc<[u8]>, cell: &Cell<usize>) -> bool {
| ^^^^ future returned by `private_future2` is not `Send`
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|
note: captured value is not `Send`
--> $DIR/future_not_send.rs:19:26
|
LL | async fn private_future2(rc: Rc<[u8]>, cell: &Cell<usize>) -> bool {
| ^^ has type `std::rc::Rc<[u8]>` which is not `Send`
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= note: `std::rc::Rc<[u8]>` doesn't implement `std::marker::Send`
note: captured value is not `Send` because `&` references cannot be sent unless their referent is `Sync`
--> $DIR/future_not_send.rs:19:40
|
LL | async fn private_future2(rc: Rc<[u8]>, cell: &Cell<usize>) -> bool {
| ^^^^ has type `&std::cell::Cell<usize>` which is not `Send`, because `std::cell::Cell<usize>` is not `Sync`
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= note: `std::cell::Cell<usize>` doesn't implement `std::marker::Sync`
error: future cannot be sent between threads safely
--> $DIR/future_not_send.rs:23:43
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|
LL | pub async fn public_future2(rc: Rc<[u8]>) {}
| ^ future returned by `public_future2` is not `Send`
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|
note: captured value is not `Send`
--> $DIR/future_not_send.rs:23:29
|
LL | pub async fn public_future2(rc: Rc<[u8]>) {}
| ^^ has type `std::rc::Rc<[u8]>` which is not `Send`
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= note: `std::rc::Rc<[u8]>` doesn't implement `std::marker::Send`
error: future cannot be sent between threads safely
--> $DIR/future_not_send.rs:34:39
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|
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
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--> $DIR/future_not_send.rs:35:23
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|
LL | async fn private_future(&self) -> usize {
| ----- has type `&Dummy` which is not `Send`
LL | async { true }.await;
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| ^^^^^^ await occurs here, with `&self` maybe used later
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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:39:39
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|
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
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--> $DIR/future_not_send.rs:40:30
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|
LL | pub async fn public_future(&self) {
| ----- has type `&Dummy` which is not `Send`
LL | self.private_future().await;
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| ^^^^^^ await occurs here, with `&self` maybe used later
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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:49:37
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|
LL | async fn generic_future<T>(t: T) -> T
| ^ future returned by `generic_future` is not `Send`
|
note: future is not `Send` as this value is used across an await
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--> $DIR/future_not_send.rs:54:19
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|
LL | let rt = &t;
| -- has type `&T` which is not `Send`
LL | async { true }.await;
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| ^^^^^^ await occurs here, with `rt` maybe used later
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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:65:34
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|
LL | async fn unclear_future<T>(t: T) {}
| ^ future returned by `unclear_future` is not `Send`
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|
note: captured value is not `Send`
--> $DIR/future_not_send.rs:65:28
|
LL | async fn unclear_future<T>(t: T) {}
| ^ has type `T` which is not `Send`
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= note: `T` doesn't implement `std::marker::Send`
error: aborting due to 8 previous errors