src/test/ui/type-alias-impl-trait/cross_inference_pattern_bug_no_type.stderr

   1 error: unconstrained opaque type
   2   --> $DIR/cross_inference_pattern_bug_no_type.rs:10:14
   3    |
   4 LL |     type T = impl Copy;  // error: unconstrained opaque type
   5    |              ^^^^^^^^^
   6    |
   7    = note: `T` must be used in combination with a concrete type within the same module
   8
   9 error: aborting due to previous error
  10