error[E0751]: found both positive and negative implementation of trait `Send` for type `TestType<_>`:
  --> $DIR/coherence-conflicting-negative-trait-impl.rs:11:1
   |
LL | unsafe impl<T: MyTrait + 'static> Send for TestType<T> {}
   | ------------------------------------------------------ positive implementation here
LL |
LL | impl<T: MyTrait> !Send for TestType<T> {}
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ negative implementation here

error[E0119]: conflicting implementations of trait `Send` for type `TestType<_>`
  --> $DIR/coherence-conflicting-negative-trait-impl.rs:13:1
   |
LL | unsafe impl<T: MyTrait + 'static> Send for TestType<T> {}
   | ------------------------------------------------------ first implementation here
...
LL | unsafe impl<T: 'static> Send for TestType<T> {}
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ conflicting implementation for `TestType<_>`

error: aborting due to 2 previous errors

Some errors have detailed explanations: E0119, E0751.
For more information about an error, try `rustc --explain E0119`.