error[E0308]: mismatched types | |
--> $DIR/mut-cross-borrowing.rs:7:7 | |
| | |
LL | f(x) | |
| ^ | |
| | | |
| expected &mut isize, found struct `std::boxed::Box` | |
| help: consider mutably borrowing here: `&mut x` | |
| | |
= note: expected type `&mut isize` | |
found type `std::boxed::Box<{integer}>` | |
error: aborting due to previous error | |
For more information about this error, try `rustc --explain E0308`. |