error[E0502]: cannot borrow `v` as mutable because it is also borrowed as immutable --> $DIR/issue-82462.rs:18:9 | LL | for x in DroppingSlice(&*v).iter() { | ------------------ | | | | | immutable borrow occurs here | a temporary with access to the immutable borrow is created here ... LL | v.push(*x); | ^^^^^^^^^^ mutable borrow occurs here LL | break; LL | } | - ... and the immutable borrow might be used here, when that temporary is dropped and runs the `Drop` code for type `DroppingSlice` | help: consider adding semicolon after the expression so its temporaries are dropped sooner, before the local variables declared by the block are dropped | LL | }; | + error: aborting due to 1 previous error For more information about this error, try `rustc --explain E0502`.