error[E0117]: only traits defined in the current crate can be implemented for primitive types
  --> $DIR/impl-foreign-for-foreign.rs:10:1
   |
LL | impl Remote for i32 {
   | ^^^^^^^^^^^^^^^^---
   | |               |
   | |               `i32` is not defined in the current crate
   | 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 1 previous error

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