error: cannot find derive macro `Send` in this scope --> $DIR/deriving-bounds.rs:1:10 | LL | #[derive(Send)] | ^^^^ | note: unsafe traits like `Send` should be implemented explicitly --> $DIR/deriving-bounds.rs:1:10 | LL | #[derive(Send)] | ^^^^ error: cannot find derive macro `Sync` in this scope --> $DIR/deriving-bounds.rs:5:10 | LL | #[derive(Sync)] | ^^^^ | note: unsafe traits like `Sync` should be implemented explicitly --> $DIR/deriving-bounds.rs:5:10 | LL | #[derive(Sync)] | ^^^^ error: aborting due to 2 previous errors