error[E0119]: conflicting implementations of trait `MyTrait`
  --> $DIR/coherence-blanket-conflicts-with-blanket-unimplemented.rs:20:1
   |
LL | impl<T:Even> MyTrait for T {
   | -------------------------- first implementation here
...
LL | impl<T:Odd> MyTrait for T {
   | ^^^^^^^^^^^^^^^^^^^^^^^^^ conflicting implementation

error: aborting due to 1 previous error

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