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// from rfc2005 test suite
// Verify the binding mode shifts - only when no `&` are auto-dereferenced is the
// final default binding mode mutable.
fn main() {
let Some(n) = &&Some(5i32) else { return };
*n += 1; //~ ERROR cannot assign to `*n`, which is behind a `&` reference
let _ = n;
let Some(n) = &mut &Some(5i32) else { return };
*n += 1; //~ ERROR cannot assign to `*n`, which is behind a `&` reference
let _ = n;
let Some(n) = &&mut Some(5i32) else { return };
*n += 1; //~ ERROR cannot assign to `*n`, which is behind a `&` reference
let _ = n;
}
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