src/test/ui/mut/mutable-class-fields-2.stderr

error[E0594]: cannot assign to field `self.how_hungry` of immutable binding
  --> $DIR/mutable-class-fields-2.rs:19:5
   |
LL |   pub fn eat(&self) {
   |              ----- use `&mut self` here to make mutable
LL |     self.how_hungry -= 5; //~ ERROR cannot assign
   |     ^^^^^^^^^^^^^^^^^^^^ cannot mutably borrow field of immutable binding

error: aborting due to previous error

For more information about this error, try `rustc --explain E0594`.