error[E0506]: cannot assign to `a[_]` because it is borrowed --> $DIR/borrowck-vec-pattern-move-tail.rs:8:5 | LL | [1, 2, ref tail @ ..] => tail, | -------- `a[_]` is borrowed here ... LL | a[2] = 0; | ^^^^^^^^ `a[_]` is assigned to here but it was already borrowed LL | println!("t[0]: {}", t[0]); | ---- borrow later used here error: aborting due to 1 previous error For more information about this error, try `rustc --explain E0506`.