error[E0277]: `(dyn Dummy + 'a)` cannot be shared between threads safely
  --> $DIR/kindck-send-object1.rs:10:19
   |
LL |     assert_send::<&'a dyn Dummy>();
   |                   ^^^^^^^^^^^^^ `(dyn Dummy + 'a)` cannot be shared between threads safely
   |
   = help: the trait `Sync` is not implemented for `(dyn Dummy + 'a)`
   = note: consider using `std::sync::Arc<(dyn Dummy + 'a)>`; for more information visit <https://doc.rust-lang.org/book/ch16-03-shared-state.html>
   = note: required for `&'a (dyn Dummy + 'a)` to implement `Send`
note: required by a bound in `assert_send`
  --> $DIR/kindck-send-object1.rs:5:18
   |
LL | fn assert_send<T:Send+'static>() { }
   |                  ^^^^ required by this bound in `assert_send`

error[E0277]: `(dyn Dummy + 'a)` cannot be sent between threads safely
  --> $DIR/kindck-send-object1.rs:28:19
   |
LL |     assert_send::<Box<dyn Dummy + 'a>>();
   |                   ^^^^^^^^^^^^^^^^^^^ `(dyn Dummy + 'a)` cannot be sent between threads safely
   |
   = help: the trait `Send` is not implemented for `(dyn Dummy + 'a)`
   = note: consider using `std::sync::Arc<(dyn Dummy + 'a)>`; for more information visit <https://doc.rust-lang.org/book/ch16-03-shared-state.html>
   = note: required for `Unique<(dyn Dummy + 'a)>` to implement `Send`
note: required because it appears within the type `Box<dyn Dummy>`
  --> $SRC_DIR/alloc/src/boxed.rs:LL:COL
note: required by a bound in `assert_send`
  --> $DIR/kindck-send-object1.rs:5:18
   |
LL | fn assert_send<T:Send+'static>() { }
   |                  ^^^^ required by this bound in `assert_send`

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0277`.