error[E0506]: cannot assign to `x` because it is borrowed --> $DIR/borrowck-lend-flow-match.rs:12:13 | LL | Some(ref r) => { | ----- `x` is borrowed here LL | x = Some(1); | ^^^^^^^^^^^ `x` is assigned to here but it was already borrowed LL | drop(r); | - borrow later used here error: aborting due to 1 previous error For more information about this error, try `rustc --explain E0506`.