| error[E0277]: `Rc<i8>` cannot be sent between threads safely | |
| --> $DIR/builtin-superkinds-simple.rs:6:6 | |
| | | |
| LL | trait Foo : Send { } | |
| | ---- required by this bound in `Foo` | |
| LL | | |
| LL | impl Foo for std::rc::Rc<i8> { } | |
| | ^^^ `Rc<i8>` cannot be sent between threads safely | |
| | | |
| = help: the trait `Send` is not implemented for `Rc<i8>` | |
| error: aborting due to previous error | |
| For more information about this error, try `rustc --explain E0277`. |