1 error: the type of the `self` parameter does not need to be arbitrary
2 --> $DIR/needless_arbitrary_self_type_unfixable.rs:41:31
4 LL | fn call_with_mut_self(self: &mut Self) {}
5 | ^^^^^^^^^^^^^^^ help: consider to change this parameter to: `&'_ mut self`
7 = note: `-D clippy::needless-arbitrary-self-type` implied by `-D warnings`
9 error: aborting due to previous error