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error: `async` trait bounds are only allowed in Rust 2018 or later
--> $DIR/edition-2015.rs:2:16
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LL | fn foo(x: impl async Fn()) -> impl async Fn() { x }
| ^^^^^
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= help: pass `--edition 2024` to `rustc`
= note: for more on editions, read https://doc.rust-lang.org/edition-guide
error: `async` trait bounds are only allowed in Rust 2018 or later
--> $DIR/edition-2015.rs:2:36
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LL | fn foo(x: impl async Fn()) -> impl async Fn() { x }
| ^^^^^
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= help: pass `--edition 2024` to `rustc`
= note: for more on editions, read https://doc.rust-lang.org/edition-guide
error[E0658]: `async` trait bounds are unstable
--> $DIR/edition-2015.rs:2:16
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LL | fn foo(x: impl async Fn()) -> impl async Fn() { x }
| ^^^^^
|
= note: see issue #62290 <https://github.com/rust-lang/rust/issues/62290> for more information
= help: add `#![feature(async_trait_bounds)]` to the crate attributes to enable
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
= help: use the desugared name of the async trait, such as `AsyncFn`
error[E0658]: `async` trait bounds are unstable
--> $DIR/edition-2015.rs:2:36
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LL | fn foo(x: impl async Fn()) -> impl async Fn() { x }
| ^^^^^
|
= note: see issue #62290 <https://github.com/rust-lang/rust/issues/62290> for more information
= help: add `#![feature(async_trait_bounds)]` to the crate attributes to enable
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
= help: use the desugared name of the async trait, such as `AsyncFn`
error: aborting due to 4 previous errors
For more information about this error, try `rustc --explain E0658`.
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