error[E0751]: found both positive and negative implementation of trait `Send` for type `TestType<_>`:
  --> $DIR/issue-106755.rs:13:1
   |
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/issue-106755.rs:15:1
   |
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<_>`

warning: cross-crate traits with a default impl, like `Send`, should not be specialized
  --> $DIR/issue-106755.rs:17:1
   |
LL | impl !Send for TestType<i32> {}
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = warning: this will change its meaning in a future release!
   = note: for more information, see issue #93367 <https://github.com/rust-lang/rust/issues/93367>
   = note: `i32` is not a generic parameter
note: try using the same sequence of generic parameters as the struct definition
  --> $DIR/issue-106755.rs:9:1
   |
LL | struct TestType<T>(::std::marker::PhantomData<T>);
   | ^^^^^^^^^^^^^^^^^^
   = note: `#[warn(suspicious_auto_trait_impls)]` on by default

error: aborting due to 2 previous errors; 1 warning emitted

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