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```
help: consider restricting type parameter `T` with traits `Copy` and `Trait`
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LL | fn duplicate_custom<T: Copy + Trait>(t: S<T>) -> (S<T>, S<T>) {
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```
```
help: consider restricting type parameter `V` with trait `Copy`
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LL | fn index<'a, K, V: std::marker::Copy>(map: &'a HashMap<K, V>, k: K) -> &'a V {
| +++++++++++++++++++
```
20 lines
692 B
Plaintext
20 lines
692 B
Plaintext
error[E0277]: the trait bound `T: Copy` is not satisfied
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--> $DIR/wf-trait-superbound.rs:9:21
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LL | trait SomeTrait<T>: ExtraCopy<T> {
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| ^^^^^^^^^^^^ the trait `Copy` is not implemented for `T`
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note: required by a bound in `ExtraCopy`
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--> $DIR/wf-trait-superbound.rs:7:19
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LL | trait ExtraCopy<T:Copy> { }
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| ^^^^ required by this bound in `ExtraCopy`
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help: consider restricting type parameter `T` with trait `Copy`
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LL | trait SomeTrait<T: std::marker::Copy>: ExtraCopy<T> {
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error: aborting due to 1 previous error
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For more information about this error, try `rustc --explain E0277`.
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