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// check-pass
// rust-lang/rust#72225: confusing diagnostics when calling FnMut through DerefMut.
use std::cell::RefCell;
struct S {
f: Box<dyn FnMut()>
}
fn test(s: &RefCell<S>) {
let mut guard = s.borrow_mut();
(guard.f)();
}
fn main() {
let s = RefCell::new(S {
f: Box::new(|| ())
});
test(&s);
}
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