1 error[E0282]: type annotations needed
2 --> $DIR/issue-91762.rs:25:15
4 LL | ret = <Self::Base as Functor>::fmap(arg);
5 | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot infer type for type parameter `T` declared on the associated function `fmap`
7 error: aborting due to previous error
9 For more information about this error, try `rustc --explain E0282`.