1 error[E0596]: cannot borrow `x` as mutable, as it is not declared as mutable
2 --> $DIR/borrowck-auto-mut-ref-to-immut-var.rs:15:5
5 | ^^^^^^^^^^^ cannot borrow as mutable
7 help: consider changing this to be mutable
9 LL | let mut x = Foo { x: 3 };
12 error: aborting due to previous error
14 For more information about this error, try `rustc --explain E0596`.