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https://github.com/rust-lang/rust
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13 lines
330 B
Rust
13 lines
330 B
Rust
// MutexGuard<Cell<i32>> must not be Sync, that would be unsound.
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use std::sync::Mutex;
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use std::cell::Cell;
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fn test_sync<T: Sync>(_t: T) {}
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fn main()
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{
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let m = Mutex::new(Cell::new(0i32));
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let guard = m.lock().unwrap();
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test_sync(guard);
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//~^ ERROR `Cell<i32>` cannot be shared between threads safely [E0277]
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}
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