1 error[E0596]: cannot borrow `self` as mutable, as it is not declared as mutable
2 --> $DIR/issue-93078.rs:11:9
5 | ^^^^^^^^^^^^^ cannot borrow as mutable
7 = note: as `Self` may be unsized, this call attempts to take `&mut &mut self`
8 = note: however, `&mut self` expands to `self: &mut Self`, therefore `self` cannot be borrowed mutably
10 error: aborting due to previous error
12 For more information about this error, try `rustc --explain E0596`.