error[E0117]: only traits defined in the current crate can be implemented for arbitrary types
  --> $DIR/issue-99572-impl-trait-on-pointer.rs:7:1
   |
LL | impl fmt::Display for *mut LocalType {
   | ^^^^^^^^^^^^^^^^^^^^^^--------------
   | |                     |
   | |                     `*mut LocalType` is not defined in the current crate because raw pointers are always foreign
   | impl doesn't use only types from inside the current crate
   |
   = note: define and implement a trait or new type instead
help: consider introducing a new wrapper type
   |
LL + struct WrapperType(*mut LocalType);
LL + 
LL ~ impl fmt::Display for WrapperType {
   |

error[E0117]: only traits defined in the current crate can be implemented for arbitrary types
  --> $DIR/issue-99572-impl-trait-on-pointer.rs:18:1
   |
LL | impl<T> marker::Copy for *mut T {
   | ^^^^^^^^^^^^^^^^^^^^^^^^^------
   | |                        |
   | |                        `*mut T` is not defined in the current crate because raw pointers are always foreign
   | impl doesn't use only types from inside the current crate
   |
   = note: define and implement a trait or new type instead

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0117`.