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error[E0277]: the trait bound `T: Copy` is not satisfied
--> $DIR/wf-trait-superbound.rs:9:21
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LL | trait SomeTrait<T>: ExtraCopy<T> {
| ^^^^^^^^^^^^ the trait `Copy` is not implemented for `T`
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note: required by a bound in `ExtraCopy`
--> $DIR/wf-trait-superbound.rs:7:19
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LL | trait ExtraCopy<T:Copy> { }
| ^^^^ required by this bound in `ExtraCopy`
help: consider restricting type parameter `T`
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LL | trait SomeTrait<T: std::marker::Copy>: ExtraCopy<T> {
| +++++++++++++++++++
error: aborting due to 1 previous error
For more information about this error, try `rustc --explain E0277`.
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