src/test/ui/impl-trait/issue-67166.stderr

   1 error[E0720]: opaque type expands to a recursive type
   2   --> $DIR/issue-67166.rs:7:19
   3    |
   4 LL |     let _foo: Box<impl Copy + '_> = Box::new(()); // FIXME: The error doesn't much make sense.
   5    |                   ^^^^^^^^^^^^^^ expands to a recursive type
   6    |
   7    = note: type resolves to itself
   8
   9 error: aborting due to previous error
  10
  11 For more information about this error, try `rustc --explain E0720`.