error[E0596]: cannot borrow `not_mut` as mutable, as it is not declared as mutable --> $DIR/nested-binding-modes-mut.rs:4:5 | LL | let mut is_mut @ not_mut = 42; | ------- help: consider changing this to be mutable: `mut not_mut` LL | &mut is_mut; LL | &mut not_mut; | ^^^^^^^^^^^^ cannot borrow as mutable error[E0596]: cannot borrow `not_mut` as mutable, as it is not declared as mutable --> $DIR/nested-binding-modes-mut.rs:9:5 | LL | let not_mut @ mut is_mut = 42; | -------------------- help: consider changing this to be mutable: `mut not_mut` LL | &mut is_mut; LL | &mut not_mut; | ^^^^^^^^^^^^ cannot borrow as mutable error: aborting due to 2 previous errors For more information about this error, try `rustc --explain E0596`.