error[E0502]: cannot borrow `*self` as mutable because it is also borrowed as immutable --> $DIR/issue-105761-suggest-self-for-closure.rs:11:9 | LL | let x = |v: i32| { | -------- immutable borrow occurs here LL | self.bar(); | ---- first borrow occurs due to use of `self` in closure ... LL | self.qux(); | ^^^^^^^^^^ mutable borrow occurs here LL | x(1); | - immutable borrow later used here | help: try explicitly pass `&Self` into the Closure as an argument | LL ~ let x = |this: &Self, v: i32| { LL ~ this.bar(); LL ~ this.hel(); LL | }; LL | self.qux(); LL ~ x(self, 1); LL ~ x(self, 3); | error[E0502]: cannot borrow `*self` as mutable because it is also borrowed as immutable --> $DIR/issue-105761-suggest-self-for-closure.rs:23:9 | LL | let y = || { | -- immutable borrow occurs here LL | self.bar(); | ---- first borrow occurs due to use of `self` in closure LL | }; LL | self.qux(); | ^^^^^^^^^^ mutable borrow occurs here LL | y(); | - immutable borrow later used here | help: try explicitly pass `&Self` into the Closure as an argument | LL ~ let y = |this: &Self| { LL ~ this.bar(); LL | }; LL | self.qux(); LL ~ y(self); | error: aborting due to 2 previous errors For more information about this error, try `rustc --explain E0502`.