error[E0412]: cannot find type `T` in this scope
  --> $DIR/issue-75627.rs:3:26
   |
LL | unsafe impl Send for Foo<T> {}
   |            -             ^ not found in this scope
   |            |
   |            help: you might be missing a type parameter: `<T>`

error: aborting due to previous error

For more information about this error, try `rustc --explain E0412`.