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error[E0277]: `U` doesn't implement `Debug`
--> $DIR/generic_duplicate_param_use4.rs:11:5
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LL | u
| ^ `U` cannot be formatted using `{:?}` because it doesn't implement `Debug`
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help: consider restricting type parameter `U`
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LL | type Two<T, U: std::fmt::Debug> = impl Debug;
| +++++++++++++++++
error: aborting due to 1 previous error
For more information about this error, try `rustc --explain E0277`.
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