| $ cargo run | |
| Compiling borrowing v0.1.0 (file:///projects/borrowing) | |
| error[E0596]: cannot borrow `x` as mutable, as it is not declared as mutable | |
| --> src/main.rs:3:13 | |
| | | |
| 3 | let y = &mut x; | |
| | ^^^^^^ cannot borrow as mutable | |
| | | |
| help: consider changing this to be mutable | |
| | | |
| 2 | let mut x = 5; | |
| | +++ | |
| For more information about this error, try `rustc --explain E0596`. | |
| error: could not compile `borrowing` (bin "borrowing") due to 1 previous error |