struct FancyNum { num: usize } struct DropStruct { fancy: FancyNum } impl Drop for DropStruct { fn drop(&mut self) { } } fn main() { let drop_struct = DropStruct{fancy: FancyNum{num: 5}}; let fancy_field = drop_struct.fancy; //~ ERROR E0509 println!("Fancy: {}", fancy_field.num); }