tests/ui/sync/suggest-ref-cell.rs

   1 #![feature(once_cell)]
   2
   3 fn require_sync<T: Sync>() {}
   4 //~^ NOTE required by this bound in `require_sync`
   5 //~| NOTE required by a bound in `require_sync`
   6
   7 fn main() {
   8     require_sync::<std::cell::RefCell<()>>();
   9     //~^ ERROR `RefCell<()>` cannot be shared between threads safely
  10     //~| NOTE `RefCell<()>` cannot be shared between threads safely
  11     //~| NOTE use `std::sync::RwLock` instead
  12 }