error[E0224]: at least one trait is required for an object type --> $DIR/reject-dyn-pointeesized.rs:5:12 | LL | type Foo = dyn PointeeSized; | ^^^^^^^^^^^^^^^^ error[E0224]: at least one trait is required for an object type --> $DIR/reject-dyn-pointeesized.rs:14:16 | LL | let y: Box = x; | ^^^^^^^^^^^^^^^^ error: aborting due to 2 previous errors For more information about this error, try `rustc --explain E0224`.