src/test/ui/impl-trait/issues/issue-57979-nested-impl-trait-in-assoc-proj.stderr

   1 error[E0666]: nested `impl Trait` is not allowed
   2   --> $DIR/issue-57979-nested-impl-trait-in-assoc-proj.rs:9:41
   3    |
   4 LL | pub fn demo(_: impl Quux<Assoc=impl Foo<impl Bar>>) { }
   5    |                                ---------^^^^^^^^-
   6    |                                |        |
   7    |                                |        nested `impl Trait` here
   8    |                                outer `impl Trait`
   9
  10 error: aborting due to previous error
  11
  12 For more information about this error, try `rustc --explain E0666`.