error[E0277]: the trait bound `Self: Trait1` is not satisfied
  --> $DIR/issue-74816.rs:9:5
   |
LL |     type Associated: Trait1 = Self;
   |     ^^^^^^^^^^^^^^^^^------^^^^^^^^
   |     |                |
   |     |                required by this bound in `Trait2::Associated`
   |     the trait `Trait1` is not implemented for `Self`
   |
help: consider further restricting `Self`
   |
LL | trait Trait2: Trait1 {
   |             ^^^^^^^^

error[E0277]: the size for values of type `Self` cannot be known at compilation time
  --> $DIR/issue-74816.rs:9:5
   |
LL |     type Associated: Trait1 = Self;
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |     |
   |     doesn't have a size known at compile-time
   |     required by this bound in `Trait2::Associated`
   |
help: consider further restricting `Self`
   |
LL | trait Trait2: Sized {
   |             ^^^^^^^

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0277`.