error[E0282]: type annotations needed
  --> $DIR/for-loop-unconstrained-element-type.rs:8:9
   |
LL |     for i in Vec::new() { }
   |         ^    ---------- the element type for this iterator is not specified
   |         |
   |         cannot infer type

error: aborting due to previous error

For more information about this error, try `rustc --explain E0282`.
