| error[E0277]: `std::cell::Cell<i32>` cannot be shared between threads safely |
| --> $DIR/mutexguard-sync.rs:11:15 |
| | |
| LL | fn test_sync<T: Sync>(_t: T) {} |
| | --------- ---- required by this bound in `test_sync` |
| ... |
| LL | test_sync(guard); |
| | ^^^^^ `std::cell::Cell<i32>` cannot be shared between threads safely |
| | |
| = help: the trait `std::marker::Sync` is not implemented for `std::cell::Cell<i32>` |
| = note: required because of the requirements on the impl of `std::marker::Sync` for `std::sync::MutexGuard<'_, std::cell::Cell<i32>>` |
| |
| error: aborting due to previous error |
| |
| For more information about this error, try `rustc --explain E0277`. |