error[E0204]: the trait `Copy` may not be implemented for this type --> $DIR/issue-27340.rs:2:10 | LL | #[derive(Copy, Clone)] | ^^^^ LL | LL | struct Bar(Foo); | --- this field does not implement `Copy` | = note: this error originates in the derive macro `Copy` (in Nightly builds, run with -Z macro-backtrace for more info) error: aborting due to previous error For more information about this error, try `rustc --explain E0204`.