Auto merge of #3732 - phansch:fix_ice_3720, r=oli-obk

Auto merge of #3732 - phansch:fix_ice_3720, r=oli-obk

Fix ICE in vec_box lint and add run-rustfix

Includes https://github.com/rust-lang/rust-clippy/pull/3726

`hir::Ty` doesn't seem to know anything about type bounds and
`cx.tcx.type_of(def_id)` caused an ICE when it was passed a generic type
with a bound:

```
src/librustc_typeck/collect.rs:1311: unexpected non-type Node::GenericParam: Type { default: None, synthetic: None }
```

Converting it to a proper `Ty` fixes the ICE and catches a few more places
where the lint applies.

Fixes #3720