error[E0277]: the trait bound `Rc: Copy` is not satisfied --> $DIR/union-generic.rs:11:13 | LL | let u = U { a: Rc::new(0u32) }; | ^ the trait `Copy` is not implemented for `Rc` | note: required by a bound in `U` --> $DIR/union-generic.rs:6:12 | LL | union U { | ^^^^ required by this bound in `U` error[E0277]: the trait bound `Rc: Copy` is not satisfied --> $DIR/union-generic.rs:13:17 | LL | let u = U::> { a: Default::default() }; | ^^^^^^^ the trait `Copy` is not implemented for `Rc` | note: required by a bound in `U` --> $DIR/union-generic.rs:6:12 | LL | union U { | ^^^^ required by this bound in `U` error: aborting due to 2 previous errors For more information about this error, try `rustc --explain E0277`.