error: item does not constrain `A::{opaque#0}`, but has it in its signature
  --> $DIR/two_tait_defining_each_other2.rs:11:4
   |
LL | fn muh(x: A) -> B {
   |    ^^^
   |
   = note: consider moving the opaque type's declaration and defining uses into a separate module
note: this opaque type is in the signature
  --> $DIR/two_tait_defining_each_other2.rs:6:10
   |
LL | type A = impl Foo;
   |          ^^^^^^^^

error: unconstrained opaque type
  --> $DIR/two_tait_defining_each_other2.rs:6:10
   |
LL | type A = impl Foo;
   |          ^^^^^^^^
   |
   = note: `A` must be used in combination with a concrete type within the same module

error: opaque type's hidden type cannot be another opaque type from the same scope
  --> $DIR/two_tait_defining_each_other2.rs:14:5
   |
LL |     x // B's hidden type is A (opaquely)
   |     ^ one of the two opaque types used here has to be outside its defining scope
   |
note: opaque type whose hidden type is being assigned
  --> $DIR/two_tait_defining_each_other2.rs:7:10
   |
LL | type B = impl Foo;
   |          ^^^^^^^^
note: opaque type being used as hidden type
  --> $DIR/two_tait_defining_each_other2.rs:6:10
   |
LL | type A = impl Foo;
   |          ^^^^^^^^

error: aborting due to 3 previous errors