1 error[E0596]: cannot borrow immutable local variable `x` as mutable
5 | - help: make this binding mutable: `mut x`
6 LL | let y = &mut x; //[ast]~ ERROR [E0596]
7 | ^ cannot borrow mutably
9 error: aborting due to previous error
11 For more information about this error, try `rustc --explain E0596`.