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`.