1 error[E0308]: mismatched types
2 --> $DIR/mut-cross-borrowing.rs:7:7
5 | - ^ expected `&mut isize`, found `Box<{integer}>`
7 | arguments to this function are incorrect
9 = note: expected mutable reference `&mut isize`
10 found struct `Box<{integer}>`
11 note: function defined here
12 --> $DIR/mut-cross-borrowing.rs:1:4
14 LL | fn f(_: &mut isize) {}
16 help: consider mutably borrowing here
21 error: aborting due to 1 previous error
23 For more information about this error, try `rustc --explain E0308`.