// 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); | |
} |