error[E0038]: the trait `Super` is not dyn compatible
  --> $DIR/gat-incompatible-supertrait.rs:15:21
   |
LL | fn take_dyn(_: &dyn Child) {}
   |                     ^^^^^ `Super` is not dyn compatible
   |
note: for a trait to be dyn compatible it needs to allow building a vtable
      for more information, visit <https://doc.rust-lang.org/reference/items/traits.html#dyn-compatibility>
  --> $DIR/gat-incompatible-supertrait.rs:10:10
   |
LL | trait Super {
   |       ----- this trait is not dyn compatible...
LL |     type Assoc<'a>;
   |          ^^^^^ ...because it contains the generic associated type `Assoc`
   = help: consider moving `Assoc` to another trait

error: aborting due to 1 previous error

For more information about this error, try `rustc --explain E0038`.