error[E0119]: conflicting implementations of trait `Trait` for type `(TAIT, TAIT)`
  --> $DIR/coherence_different_hidden_ty.rs:20:1
   |
LL | impl Trait for (TAIT, TAIT) {}
   | --------------------------- first implementation here
LL |
LL | impl Trait for (u32, i32) {}
   | ^^^^^^^^^^^^^^^^^^^^^^^^^ conflicting implementation for `(TAIT, TAIT)`

error: aborting due to 1 previous error

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