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error[E0277]: `main` has invalid return type `impl Copy`
--> $DIR/termination-trait-impl-trait.rs:2:14
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LL | fn main() -> impl Copy { }
| ^^^^^^^^^ `main` can only return types that implement `Termination`
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= help: consider using `()`, or a `Result`
error: aborting due to previous error
For more information about this error, try `rustc --explain E0277`.
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