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 for `Wrapper<P>` to implement `for<'b> Wrap<'b>`
   9   --> $DIR/issue-22872.rs:7:13
  10    |
  11 LL | impl<'b, P> Wrap<'b> for Wrapper<P>
  12    |             ^^^^^^^^     ^^^^^^^^^^
  13    = note: required for the cast from `Wrapper<P>` to the object type `dyn for<'b> Wrap<'b>`
  14 help: consider further restricting the associated type
  15    |
  16 LL | fn push_process<P>(process: P) where P: Process<'static>, <P as Process<'_>>::Item: Iterator {
  17    |                                                         ++++++++++++++++++++++++++++++++++++
  18
  19 error: aborting due to previous error
  20
  21 For more information about this error, try `rustc --explain E0277`.