File: send-sync.rs

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rustc 1.86.0%2Bdfsg1-1
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fn send<T: Send>(_: T) {}
fn sync<T: Sync>(_: T) {}

fn main() {
    // `Cell` is not `Sync`, so `&Cell` is neither `Sync` nor `Send`,
    // `std::fmt::Arguments` used to forget this...
    let c = std::cell::Cell::new(42);
    send(format_args!("{:?}", c)); //~ ERROR E0277
    sync(format_args!("{:?}", c)); //~ ERROR E0277
}