| error[E0596]: cannot borrow `**layer` as mutable, as it is behind a `&` reference |
| --> $DIR/issue-115259-suggest-iter-mut.rs:15:65 |
| | |
| LL | self.layers.iter().fold(0, |result, mut layer| result + layer.process()) |
| | --------- ^^^^^ `layer` is a `&` reference, so the data it refers to cannot be borrowed as mutable |
| | | |
| | consider changing this binding's type to be: `&mut Box<dyn Layer>` |
| | |
| help: you may want to use `iter_mut` here |
| | |
| LL | self.layers.iter_mut().fold(0, |result, mut layer| result + layer.process()) |
| | ~~~~~~~~ |
| |
| error: aborting due to 1 previous error |
| |
| For more information about this error, try `rustc --explain E0596`. |
