error: item does not constrain `ex1::Tait1::{opaque#0}`
  --> $DIR/no-define-in-wf-check.rs:21:8
   |
LL |     fn foo(x: Tait1) -> impl Sized {
   |        ^^^
   |
   = note: consider removing `#[define_opaque]` or adding an empty `#[define_opaque()]`
note: this opaque type is supposed to be constrained
  --> $DIR/no-define-in-wf-check.rs:19:18
   |
LL |     type Tait1 = impl Sized;
   |                  ^^^^^^^^^^

error: item does not constrain `ex2::Tait1::{opaque#0}`
  --> $DIR/no-define-in-wf-check.rs:31:8
   |
LL |     fn foo(x: Tait1) -> Tait2 {
   |        ^^^
   |
   = note: consider removing `#[define_opaque]` or adding an empty `#[define_opaque()]`
note: this opaque type is supposed to be constrained
  --> $DIR/no-define-in-wf-check.rs:28:18
   |
LL |     type Tait1 = impl Sized;
   |                  ^^^^^^^^^^

error: item does not constrain `ex3::Tait1::{opaque#0}`
  --> $DIR/no-define-in-wf-check.rs:43:8
   |
LL |     fn foo(x: Tait1) -> Tait2 {
   |        ^^^
   |
   = note: consider removing `#[define_opaque]` or adding an empty `#[define_opaque()]`
note: this opaque type is supposed to be constrained
  --> $DIR/no-define-in-wf-check.rs:38:18
   |
LL |     type Tait1 = impl Sized;
   |                  ^^^^^^^^^^

error: item does not constrain `ex4::Tait1::{opaque#0}`
  --> $DIR/no-define-in-wf-check.rs:64:8
   |
LL |     fn foo(x: Tait1) -> Tait2 {
   |        ^^^
   |
   = note: consider removing `#[define_opaque]` or adding an empty `#[define_opaque()]`
note: this opaque type is supposed to be constrained
  --> $DIR/no-define-in-wf-check.rs:50:18
   |
LL |     type Tait1 = impl Sized;
   |                  ^^^^^^^^^^

error: aborting due to 4 previous errors