error[E0210]: type parameter `T` must be used as the type parameter for some local type (e.g. `MyStruct<T>`)
  --> $DIR/coherence-pair-covered-uncovered.rs:18:1
   |
LL | impl<T,U> Remote for Pair<T,Local<U>> { }
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ type parameter `T` must be used as the type parameter for some local type
   |
   = note: only traits defined in the current crate can be implemented for a type parameter

error: aborting due to previous error

For more information about this error, try `rustc --explain E0210`.