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