error: `Vec<T>` is already on the heap, the boxing is unnecessary.
  --> $DIR/vec_box_sized.rs:10:14
   |
10 |     sized_type: Vec<Box<SizedStruct>>,
   |                 ^^^^^^^^^^^^^^^^^^^^^ help: try: `Vec<SizedStruct>`
   |
   = note: `-D clippy::vec-box` implied by `-D warnings`

error: aborting due to previous error