src/test/ui/issues/issue-22872.stderr

   1 error[E0277]: `<P as Process<'_>>::Item` is not an iterator
   2   --> $DIR/issue-22872.rs:20:40
   3    |
   4 LL |     let _: Box<dyn for<'b> Wrap<'b>> = Box::new(Wrapper(process));
   5    |                                        ^^^^^^^^^^^^^^^^^^^^^^^^^^ `<P as Process<'_>>::Item` is not an iterator
   6    |
   7    = help: the trait `Iterator` is not implemented for `<P as Process<'_>>::Item`
   8    = note: required because of the requirements on the impl of `for<'b> Wrap<'b>` for `Wrapper<P>`
   9    = note: required for the cast to the object type `dyn for<'b> Wrap<'b>`
  10 help: consider further restricting the associated type
  11    |
  12 LL | fn push_process<P>(process: P) where P: Process<'static>, <P as Process<'_>>::Item: Iterator {
  13    |                                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  14
  15 error: aborting due to previous error
  16
  17 For more information about this error, try `rustc --explain E0277`.