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#![feature(let_else)]
// Slightly different from explicit-mut-annotated -- this won't show an error until borrowck.
// Should it show a type error instead?
fn main() {
let Some(n): &mut Option<i32> = &mut &Some(5i32) else {
//~^ ERROR cannot borrow data in a `&` reference as mutable
return
};
*n += 1;
let _ = n;
}
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