| error[E0596]: cannot borrow data in a `&` reference as mutable | |
| --> $DIR/issue-19163.rs:9:14 | |
| | | |
| LL | mywrite!(&v, "Hello world"); | |
| | ^^ cannot borrow as mutable | |
| error: aborting due to previous error | |
| For more information about this error, try `rustc --explain E0596`. |