| $ cargo run | |
| Compiling ownership v0.1.0 (file:///projects/ownership) | |
| error[E0499]: cannot borrow `s` as mutable more than once at a time | |
| --> src/main.rs:5:14 | |
| | | |
| 4 | let r1 = &mut s; | |
| | ------ first mutable borrow occurs here | |
| 5 | let r2 = &mut s; | |
| | ^^^^^^ second mutable borrow occurs here | |
| 6 | | |
| 7 | println!("{}, {}", r1, r2); | |
| | -- first borrow later used here | |
| error: aborting due to previous error | |
| For more information about this error, try `rustc --explain E0499`. | |
| error: could not compile `ownership`. | |
| To learn more, run the command again with --verbose. |