error[E0307]: invalid method receiver type: std::boxed::Box<(dyn Trait + 'static)>
  --> $DIR/issue-56806.rs:2:34
   |
LL |     fn dyn_instead_of_self(self: Box<dyn Trait>);
   |                                  ^^^^^^^^^^^^^^
   |
   = note: type must be `Self` or a type that dereferences to it
   = help: consider changing to `self`, `&self`, `&mut self`, or `self: Box<Self>`

error: aborting due to previous error

For more information about this error, try `rustc --explain E0307`.