error: variable does not need to be mutable --> $DIR/lint-unused-mut-self.rs:8:12 | LL | fn foo(mut self) {} //~ ERROR: variable does not need to be mutable | ----^^^^ | | | help: remove this `mut` | note: lint level defined here --> $DIR/lint-unused-mut-self.rs:4:9 | LL | #![deny(unused_mut)] | ^^^^^^^^^^ error: variable does not need to be mutable --> $DIR/lint-unused-mut-self.rs:9:12 | LL | fn bar(mut self: Box) {} //~ ERROR: variable does not need to be mutable | ----^^^^ | | | help: remove this `mut` error: aborting due to 2 previous errors