error[E0277]: the trait bound `T: Copy` is not satisfied
  --> $DIR/issue-33017.rs:12:27
   |
LL |     default type Output = Self;
   |                           ^^^^ the trait `Copy` is not implemented for `T`
   |
note: required by a bound in `UncheckedCopy::Output`
  --> $DIR/issue-33017.rs:8:31
   |
LL |     type Output: From<Self> + Copy + Into<Self>;
   |                               ^^^^ required by this bound in `UncheckedCopy::Output`
help: consider restricting type parameter `T`
   |
LL | impl<T: std::marker::Copy> UncheckedCopy for T {
   |       +++++++++++++++++++

error: aborting due to 1 previous error

For more information about this error, try `rustc --explain E0277`.