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