error[E0277]: the trait bound `U: Copy` is not satisfied
--> $DIR/wf-trait-bound.rs:10:14
|
-LL | trait ExtraCopy<T:Copy> { }
- | ---- required by this bound in `ExtraCopy`
-...
LL | where T: ExtraCopy<U>
| ^^^^^^^^^^^^ the trait `Copy` is not implemented for `U`
|
+note: required by a bound in `ExtraCopy`
+ --> $DIR/wf-trait-bound.rs:7:19
+ |
+LL | trait ExtraCopy<T:Copy> { }
+ | ^^^^ required by this bound in `ExtraCopy`
help: consider further restricting type parameter `U`
|
LL | where T: ExtraCopy<U>, U: std::marker::Copy
- | ^^^^^^^^^^^^^^^^^^^^^^
+ | ++++++++++++++++++++++
error: aborting due to previous error