tests/ui/issues/issue-22370.stderr

   1 error[E0393]: the type parameter `T` must be explicitly specified
   2   --> $DIR/issue-22370.rs:3:14
   3    |
   4 LL | trait A<T=Self> {}
   5    | --------------- type parameter `T` must be specified for this
   6 LL |
   7 LL | fn f(a: &dyn A) {}
   8    |              ^ help: set the type parameter to the desired type: `A<T>`
   9    |
  10    = note: because of the default `Self` reference, type parameters must be specified on object types
  11
  12 error: aborting due to previous error
  13
  14 For more information about this error, try `rustc --explain E0393`.