error[E0716]: temporary value dropped while borrowed
  --> $DIR/regions-var-type-out-of-scope.rs:9:14
   |
LL |         x = &id(3);
   |              ^^^^^- temporary value is freed at the end of this statement
   |              |
   |              creates a temporary which is freed while still in use
LL |         assert_eq!(*x, 3);
   |         ----------------- borrow later used here
   |
   = note: consider using a `let` binding to create a longer lived value

error: aborting due to previous error

For more information about this error, try `rustc --explain E0716`.