error[E0277]: `*const ()` cannot be sent between threads safely
  --> $DIR/non_send.rs:12:24
   |
12 |     let _: &dyn Send = &mock;
   |                        ^^^^^ `*const ()` cannot be sent between threads safely
   |
   = help: within `AMock`, the trait `Send` is not implemented for `*const ()`
   = note: required because it appears within the type `((), *const ())`
note: required because it appears within the type `PhantomData<((), *const ())>`
  --> $DIR/marker.rs:809:12
note: required because it appears within the type `AMock`
  --> $DIR/non_send.rs:6:1
   |
6  | #[mocked]
   | ^^^^^^^^^
   = note: required for the cast from `&AMock` to `&dyn Send`
   = note: this error originates in the attribute macro `mocked` (in Nightly builds, run with -Z macro-backtrace for more info)