error[E0119]: conflicting implementations of trait `Foo` for type `u8`:
  --> $DIR/specialization-polarity.rs:9:1
   |
LL | impl<T> Foo for T {}
   | ----------------- first implementation here
LL | impl !Foo for u8 {} //~ ERROR E0119
   | ^^^^^^^^^^^^^^^^ conflicting implementation for `u8`

error[E0119]: conflicting implementations of trait `Bar` for type `u8`:
  --> $DIR/specialization-polarity.rs:14:1
   |
LL | impl<T> !Bar for T {}
   | ------------------ first implementation here
LL | impl Bar for u8 {} //~ ERROR E0119
   | ^^^^^^^^^^^^^^^ conflicting implementation for `u8`

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0119`.