error[E0119]: conflicting implementations of trait `Clone` for type `Node<[_]>`
  --> $DIR/issue-48728.rs:9:10
   |
LL | #[derive(Clone)]
   |          ^^^^^ conflicting implementation for `Node<[_]>`
...
LL | impl<T: Clone + ?Sized> Clone for Node<[T]> {
   | ------------------------------------------- first implementation here
   |
   = note: upstream crates may add a new impl of trait `std::clone::Clone` for type `[_]` in future versions
   = note: this error originates in the derive macro `Clone` (in Nightly builds, run with -Z macro-backtrace for more info)

error: aborting due to 1 previous error

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