| error[E0499]: cannot borrow `v` as mutable more than once at a time | |
| --> $DIR/two-phase-sneaky.rs:10:9 | |
| | | |
| LL | v[0].push_str({ | |
| | - -------- first borrow later used by call | |
| | | | |
| | first mutable borrow occurs here | |
| LL | | |
| LL | v.push(format!("foo")); | |
| | ^ second mutable borrow occurs here | |
| error: aborting due to 1 previous error | |
| For more information about this error, try `rustc --explain E0499`. |