| error[E0596]: cannot borrow `b` as mutable, as it is not declared as mutable | |
| --> $DIR/issue-114896.rs:4:9 | |
| | | |
| LL | let &b = a; | |
| | -- help: consider changing this to be mutable: `&(mut b)` | |
| LL | b.make_ascii_uppercase(); | |
| | ^ cannot borrow as mutable | |
| error: aborting due to previous error | |
| For more information about this error, try `rustc --explain E0596`. |