error[E0782]: expected a type, found a trait
  --> tests/ui/bare-trait-object.rs:11:16
   |
11 | impl Trait for Send + Sync {
   |                ^^^^^^^^^^^
   |
help: you can add the `dyn` keyword if you want a trait object
   |
11 | impl Trait for dyn Send + Sync {
   |                +++
help: alternatively use a blanket implementation to implement `Trait` for all types that also implement `Send + Sync`
   |
11 | impl<T: Send + Sync> Trait for T {
   |     ++++++++++++++++           ~