File: mutexguard-sync.rs

package info (click to toggle)
rustc-web 1.70.0%2Bdfsg1-7~deb11u1
  • links: PTS, VCS
  • area: main
  • in suites: bullseye
  • size: 1,517,036 kB
  • sloc: xml: 147,962; javascript: 10,210; sh: 8,590; python: 8,220; ansic: 5,901; cpp: 4,635; makefile: 4,006; asm: 2,856
file content (13 lines) | stat: -rw-r--r-- 330 bytes parent folder | download | duplicates (25) 
1
2
3
4
5
6
7
8
9
10
11
12
13
 
// MutexGuard<Cell<i32>> must not be Sync, that would be unsound.
use std::sync::Mutex;
use std::cell::Cell;

fn test_sync<T: Sync>(_t: T) {}

fn main()
{
    let m = Mutex::new(Cell::new(0i32));
    let guard = m.lock().unwrap();
    test_sync(guard);
    //~^ ERROR `Cell<i32>` cannot be shared between threads safely [E0277]
}