error[E0277]: the trait bound `Self: Trait1` is not satisfied
  --> $DIR/issue-74816.rs:8:31
   |
LL |     type Associated: Trait1 = Self;
   |                               ^^^^ the trait `Trait1` is not implemented for `Self`
   |
note: required by a bound in `Trait2::Associated`
  --> $DIR/issue-74816.rs:8:22
   |
LL |     type Associated: Trait1 = Self;
   |                      ^^^^^^ required by this bound in `Trait2::Associated`
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:8:31
   |
LL |     type Associated: Trait1 = Self;
   |                               ^^^^ doesn't have a size known at compile-time
   |
note: required by a bound in `Trait2::Associated`
  --> $DIR/issue-74816.rs:8:5
   |
LL |     type Associated: Trait1 = Self;
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 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`.