src/test/ui/wf/wf-struct-bound.stderr

   1 error[E0277]: the trait bound `U: Copy` is not satisfied
   2   --> $DIR/wf-struct-bound.rs:10:14
   3    |
   4 LL | trait ExtraCopy<T:Copy> { }
   5    |                   ---- required by this bound in `ExtraCopy`
   6 ...
   7 LL |     where T: ExtraCopy<U>
   8    |              ^^^^^^^^^^^^ the trait `Copy` is not implemented for `U`
   9    |
  10 help: consider further restricting type parameter `U`
  11    |
  12 LL |     where T: ExtraCopy<U>, U: Copy
  13    |                          ^^^^^^^^^
  14
  15 error: aborting due to previous error
  16
  17 For more information about this error, try `rustc --explain E0277`.