= help: within `[closure@$DIR/no-send-res-ports.rs:25:19: 29:6]`, the trait `Send` is not implemented for `Rc<()>`
= note: required because it appears within the type `Port<()>`
= note: required because it appears within the type `Foo`
- = note: required because it appears within the type `(Foo,)`
= note: required because it appears within the type `[closure@$DIR/no-send-res-ports.rs:25:19: 29:6]`
error: aborting due to previous error