error[E0503]: cannot use `e` because it was mutably borrowed --> $DIR/borrowed-match-issue-45045.rs:12:11 | LL | let f = &mut e; | ------ borrow of `e` occurs here LL | let g = f; LL | match e { | ^ use of borrowed `e` ... LL | *g = Xyz::B; | ----------- borrow later used here error: aborting due to previous error For more information about this error, try `rustc --explain E0503`.