error[E0277]: the trait bound `T: Copy` is not satisfied --> $DIR/issue-43784-supertrait.rs:8:22 | LL | impl Complete for T {} | ^ the trait `Copy` is not implemented for `T` | note: required for `T` to implement `Partial` --> $DIR/issue-43784-supertrait.rs:1:11 | LL | pub trait Partial: Copy { | ^^^^^^^ note: required by a bound in `Complete` --> $DIR/issue-43784-supertrait.rs:4:21 | LL | pub trait Complete: Partial { | ^^^^^^^ required by this bound in `Complete` help: consider restricting type parameter `T` | LL | impl Complete for T {} | +++++++++++++++++++ error: aborting due to 1 previous error For more information about this error, try `rustc --explain E0277`.