src/test/ui/issues/issue-18183.stderr

   1 error[E0128]: generic parameters with a default cannot use forward declared identifiers
   2   --> $DIR/issue-18183.rs:1:20
   3    |
   4 LL | pub struct Foo<Bar=Bar>(Bar);
   5    |                    ^^^ defaulted generic parameters cannot be forward declared
   6
   7 error: aborting due to previous error
   8
   9 For more information about this error, try `rustc --explain E0128`.