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>`
+note: required by a bound in `Foo`
+ --> $DIR/builtin-superkinds-simple.rs:4:13
+ |
+LL | trait Foo : Send { }
+ | ^^^^ required by this bound in `Foo`
error: aborting due to previous error