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13 lines
397 B
Rust
13 lines
397 B
Rust
#![feature(once_cell)]
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fn require_sync<T: Sync>() {}
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//~^ NOTE required by this bound in `require_sync`
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//~| NOTE required by a bound in `require_sync`
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fn main() {
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require_sync::<std::cell::RefCell<()>>();
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//~^ ERROR `RefCell<()>` cannot be shared between threads safely
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//~| NOTE `RefCell<()>` cannot be shared between threads safely
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//~| NOTE use `std::sync::RwLock` instead
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}
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