| error[E0204]: the trait `Copy` cannot be implemented for this type |
| --> $DIR/union-copy.rs:12:15 |
| | |
| LL | a: std::mem::ManuallyDrop<String> |
| | --------------------------------- this field does not implement `Copy` |
| ... |
| LL | impl Copy for W {} |
| | ^ |
| | |
| note: the `Copy` impl for `ManuallyDrop<String>` requires that `String: Copy` |
| --> $DIR/union-copy.rs:8:8 |
| | |
| LL | a: std::mem::ManuallyDrop<String> |
| | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
| |
| error: aborting due to 1 previous error |
| |
| For more information about this error, try `rustc --explain E0204`. |
