error[E0038]: the trait `NonObjectSafe1` cannot be made into an object --> $DIR/feature-gate-object_safe_for_dispatch.rs:18:38 | LL | fn takes_non_object_safe_ref(obj: &dyn NonObjectSafe1) { | ^^^^^^^^^^^^^^^^^^^ the trait `NonObjectSafe1` cannot be made into an object | = note: the trait cannot require that `Self : Sized` error[E0038]: the trait `NonObjectSafe2` cannot be made into an object --> $DIR/feature-gate-object_safe_for_dispatch.rs:22:36 | LL | fn static_fn() {} | --------- associated function `static_fn` has no `self` parameter ... LL | fn return_non_object_safe_ref() -> &'static dyn NonObjectSafe2 { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `NonObjectSafe2` cannot be made into an object error[E0038]: the trait `NonObjectSafe3` cannot be made into an object --> $DIR/feature-gate-object_safe_for_dispatch.rs:27:35 | LL | fn foo(&self); | --- method `foo` has generic type parameters ... LL | fn takes_non_object_safe_box(obj: Box) { | ^^^^^^^^^^^^^^^^^^^^^^^ the trait `NonObjectSafe3` cannot be made into an object error[E0038]: the trait `NonObjectSafe4` cannot be made into an object --> $DIR/feature-gate-object_safe_for_dispatch.rs:31:35 | LL | fn foo(&self, &Self); | --- method `foo` references the `Self` type in its parameters or return type ... LL | fn return_non_object_safe_rc() -> std::rc::Rc { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `NonObjectSafe4` cannot be made into an object error[E0038]: the trait `NonObjectSafe1` cannot be made into an object --> $DIR/feature-gate-object_safe_for_dispatch.rs:38:6 | LL | impl Trait for dyn NonObjectSafe1 {} | ^^^^^ the trait `NonObjectSafe1` cannot be made into an object | = note: the trait cannot require that `Self : Sized` error: aborting due to 5 previous errors For more information about this error, try `rustc --explain E0038`.