1error[E0596]: cannot borrow data in a `&` reference as mutable
2  --> $DIR/issue-19163.rs:9:5
3   |
4LL |     mywrite!(&v, "Hello world");
5   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot borrow as mutable
6   |
7   = note: this error originates in the macro `mywrite` (in Nightly builds, run with -Z macro-backtrace for more info)
8
9error: aborting due to previous error
10
11For more information about this error, try `rustc --explain E0596`.
12