error[E0597]: `vec` does not live long enough
  --> $DIR/borrowck-vec-pattern-tail-element-loan.rs:5:26
   |
LL |     let vec: &[isize] = &vec;
   |                          ^^^ borrowed value does not live long enough
...
LL | }
   | - borrowed value only lives until here
   |
note: borrowed value must be valid for the lifetime 'a as defined on the function body at 3:6...
  --> $DIR/borrowck-vec-pattern-tail-element-loan.rs:3:6
   |
LL | fn a<'a>() -> &'a isize {
   |      ^^

error: aborting due to previous error

For more information about this error, try `rustc --explain E0597`.