44 lines
1.8 KiB
Plaintext
44 lines
1.8 KiB
Plaintext
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error[E0277]: `impl Future<Output = ()>` cannot be sent between threads safely
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--> $DIR/send-on-async-fn-in-trait.rs:14:16
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LL | needs_send(T::test());
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| ---------- ^^^^^^^^^ `impl Future<Output = ()>` cannot be sent between threads safely
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| required by a bound introduced by this call
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= help: the trait `Send` is not implemented for `impl Future<Output = ()>`
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note: required by a bound in `needs_send`
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--> $DIR/send-on-async-fn-in-trait.rs:13:27
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LL | fn needs_send(_: impl Send) {}
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| ^^^^ required by this bound in `needs_send`
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help: `Send` can be made part of the associated future's guarantees for all implementations of `Foo::test`
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LL - async fn test() -> () {}
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LL + fn test() -> impl std::future::Future<Output = ()> + Send { async {} }
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error[E0277]: `impl Future<Output = i32>` cannot be sent between threads safely
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--> $DIR/send-on-async-fn-in-trait.rs:16:16
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LL | needs_send(T::test2());
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| ---------- ^^^^^^^^^^ `impl Future<Output = i32>` cannot be sent between threads safely
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| required by a bound introduced by this call
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= help: the trait `Send` is not implemented for `impl Future<Output = i32>`
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note: required by a bound in `needs_send`
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--> $DIR/send-on-async-fn-in-trait.rs:13:27
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LL | fn needs_send(_: impl Send) {}
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| ^^^^ required by this bound in `needs_send`
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help: `Send` can be made part of the associated future's guarantees for all implementations of `Foo::test2`
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LL - async fn test2() -> i32 { 1 + 2 }
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LL + fn test2() -> impl std::future::Future<Output = i32> + Send {async { 1 + 2 } }
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error: aborting due to 2 previous errors
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For more information about this error, try `rustc --explain E0277`.
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