error[E0392]: parameter `T` is never used
  --> $DIR/E0392.rs:11:10
   |
11 | enum Foo<T> { Bar } //~ ERROR E0392
   |          ^ unused type parameter
   |
   = help: consider removing `T` or using a marker such as `std::marker::PhantomData`

error: aborting due to previous error

If you want more information on this error, try using "rustc --explain E0392"