|  | error[E0277]: `Cell<i32>` cannot be shared between threads safely | 
|  | --> $DIR/not-sync.rs:8:12 | 
|  | | | 
|  | LL | fn test<T: Sync>() {} | 
|  | |            ---- required by this bound in `test` | 
|  | ... | 
|  | LL |     test::<Cell<i32>>(); | 
|  | |            ^^^^^^^^^ `Cell<i32>` cannot be shared between threads safely | 
|  | | | 
|  | = help: the trait `Sync` is not implemented for `Cell<i32>` | 
|  |  | 
|  | error[E0277]: `RefCell<i32>` cannot be shared between threads safely | 
|  | --> $DIR/not-sync.rs:10:12 | 
|  | | | 
|  | LL | fn test<T: Sync>() {} | 
|  | |            ---- required by this bound in `test` | 
|  | ... | 
|  | LL |     test::<RefCell<i32>>(); | 
|  | |            ^^^^^^^^^^^^ `RefCell<i32>` cannot be shared between threads safely | 
|  | | | 
|  | = help: the trait `Sync` is not implemented for `RefCell<i32>` | 
|  |  | 
|  | error[E0277]: `Rc<i32>` cannot be shared between threads safely | 
|  | --> $DIR/not-sync.rs:13:12 | 
|  | | | 
|  | LL | fn test<T: Sync>() {} | 
|  | |            ---- required by this bound in `test` | 
|  | ... | 
|  | LL |     test::<Rc<i32>>(); | 
|  | |            ^^^^^^^ `Rc<i32>` cannot be shared between threads safely | 
|  | | | 
|  | = help: the trait `Sync` is not implemented for `Rc<i32>` | 
|  |  | 
|  | error[E0277]: `std::rc::Weak<i32>` cannot be shared between threads safely | 
|  | --> $DIR/not-sync.rs:15:12 | 
|  | | | 
|  | LL | fn test<T: Sync>() {} | 
|  | |            ---- required by this bound in `test` | 
|  | ... | 
|  | LL |     test::<Weak<i32>>(); | 
|  | |            ^^^^^^^^^ `std::rc::Weak<i32>` cannot be shared between threads safely | 
|  | | | 
|  | = help: the trait `Sync` is not implemented for `std::rc::Weak<i32>` | 
|  |  | 
|  | error[E0277]: `std::sync::mpsc::Receiver<i32>` cannot be shared between threads safely | 
|  | --> $DIR/not-sync.rs:18:12 | 
|  | | | 
|  | LL | fn test<T: Sync>() {} | 
|  | |            ---- required by this bound in `test` | 
|  | ... | 
|  | LL |     test::<Receiver<i32>>(); | 
|  | |            ^^^^^^^^^^^^^ `std::sync::mpsc::Receiver<i32>` cannot be shared between threads safely | 
|  | | | 
|  | = help: the trait `Sync` is not implemented for `std::sync::mpsc::Receiver<i32>` | 
|  |  | 
|  | error[E0277]: `Sender<i32>` cannot be shared between threads safely | 
|  | --> $DIR/not-sync.rs:20:12 | 
|  | | | 
|  | LL | fn test<T: Sync>() {} | 
|  | |            ---- required by this bound in `test` | 
|  | ... | 
|  | LL |     test::<Sender<i32>>(); | 
|  | |            ^^^^^^^^^^^ `Sender<i32>` cannot be shared between threads safely | 
|  | | | 
|  | = help: the trait `Sync` is not implemented for `Sender<i32>` | 
|  |  | 
|  | error: aborting due to 6 previous errors | 
|  |  | 
|  | For more information about this error, try `rustc --explain E0277`. |