src/test/ui/issues/issue-17904-2.stderr

   1 error[E0392]: parameter `T` is never used
   2   --> $DIR/issue-17904-2.rs:4:12
   3    |
   4 LL | struct Foo<T> where T: Copy;
   5    |            ^ unused parameter
   6    |
   7    = help: consider removing `T`, referring to it in a field, or using a marker such as `PhantomData`
   8    = help: if you intended `T` to be a const parameter, use `const T: usize` instead
   9
  10 error: aborting due to previous error
  11
  12 For more information about this error, try `rustc --explain E0392`.