10 lines
404 B
Rust
10 lines
404 B
Rust
fn foo(x: impl async Fn()) -> impl async Fn() { x }
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//~^ ERROR `async` trait bounds are only allowed in Rust 2018 or later
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//~| ERROR `async` trait bounds are only allowed in Rust 2018 or later
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//~| ERROR async closures are unstable
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//~| ERROR async closures are unstable
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//~| ERROR use of unstable library feature 'async_closure'
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//~| ERROR use of unstable library feature 'async_closure'
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fn main() {}
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