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error[E0038]: the trait `Trait` is not dyn compatible
--> tests/ui/no-attribute-macro.rs:12:12
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12 | let _: &dyn Trait;
| ^^^^^^^^^^ `Trait` is not dyn compatible
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note: for a trait to be dyn compatible it needs to allow building a vtable
for more information, visit <https://doc.rust-lang.org/reference/items/traits.html#dyn-compatibility>
--> tests/ui/no-attribute-macro.rs:2:14
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1 | pub trait Trait {
| ----- this trait is not dyn compatible...
2 | async fn method(&self);
| ^^^^^^ ...because method `method` is `async`
= help: consider moving `method` to another trait
= help: only type `Struct` implements `Trait` within this crate; consider using it directly instead.
= note: `Trait` may be implemented in other crates; if you want to support your users passing their own types here, you can't refer to a specific type
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