File: closure-origin-tuple-diagnostics.rs

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rustc 1.70.0%2Bdfsg1-9
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// edition:2021

struct S(String, String);

fn expect_fn<F: Fn()>(_f: F) {}

fn main() {
    let s = S(format!("s"), format!("s"));
    let c = || { //~ ERROR expected a closure that implements the `Fn`
        let s = s.1;
    };
    expect_fn(c);
}