1error[E0038]: the trait `Trait` cannot be made into an object 2 --> $DIR/feature-gate-dispatch-from-dyn-missing-impl.rs:32:25 3 | 4LL | fn ptr(self: Ptr<Self>); 5 | --------- help: consider changing method `ptr`'s `self` parameter to be `&self`: `&Self` 6... 7LL | Ptr(Box::new(4)) as Ptr<dyn Trait>; 8 | ^^^^^^^^^^^^^^ `Trait` cannot be made into an object 9 | 10note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit <https://doc.rust-lang.org/reference/items/traits.html#object-safety> 11 --> $DIR/feature-gate-dispatch-from-dyn-missing-impl.rs:25:18 12 | 13LL | trait Trait { 14 | ----- this trait cannot be made into an object... 15LL | fn ptr(self: Ptr<Self>); 16 | ^^^^^^^^^ ...because method `ptr`'s `self` parameter cannot be dispatched on 17 18error[E0038]: the trait `Trait` cannot be made into an object 19 --> $DIR/feature-gate-dispatch-from-dyn-missing-impl.rs:32:5 20 | 21LL | fn ptr(self: Ptr<Self>); 22 | --------- help: consider changing method `ptr`'s `self` parameter to be `&self`: `&Self` 23... 24LL | Ptr(Box::new(4)) as Ptr<dyn Trait>; 25 | ^^^^^^^^^^^^^^^^ `Trait` cannot be made into an object 26 | 27note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit <https://doc.rust-lang.org/reference/items/traits.html#object-safety> 28 --> $DIR/feature-gate-dispatch-from-dyn-missing-impl.rs:25:18 29 | 30LL | trait Trait { 31 | ----- this trait cannot be made into an object... 32LL | fn ptr(self: Ptr<Self>); 33 | ^^^^^^^^^ ...because method `ptr`'s `self` parameter cannot be dispatched on 34 = note: required for the cast from `Ptr<{integer}>` to `Ptr<dyn Trait>` 35 36error: aborting due to 2 previous errors 37 38For more information about this error, try `rustc --explain E0038`. 39