wtf did we do to cause this

Author: jdonszelmann

tests/ui/impl-trait/two_tait_defining_each_other2.next.stderr

@@ -1,8 +1,4 @@
 error[E0282]: type annotations needed
-  --> $DIR/two_tait_defining_each_other2.rs:12:8
-   |
-LL | fn muh(x: A) -> B {
-   |        ^ cannot infer type
 
 error: aborting due to 1 previous error
 

tests/ui/impl-trait/unsized_coercion3.next.stderr

@@ -9,7 +9,37 @@ help: the trait `Trait` is implemented for `u32`
    |
 LL | impl Trait for u32 {}
    | ^^^^^^^^^^^^^^^^^^
+note: required by a bound in `Box`
+  --> $SRC_DIR/alloc/src/boxed.rs:LL:COL
 
-error: aborting due to 1 previous error
+error[E0308]: mismatched types
+  --> $DIR/unsized_coercion3.rs:18:5
+   |
+LL | fn hello() -> Box<impl Trait + ?Sized> {
+   |               ------------------------
+   |               |   |
+   |               |   the expected opaque type
+   |               expected `Box<impl Trait + ?Sized>` because of return type
+...
+LL |     Box::new(1u32)
+   |     ^^^^^^^^^^^^^^ types differ
+   |
+   = note: expected struct `Box<impl Trait + ?Sized>`
+              found struct `Box<u32>`
+
+error[E0277]: the trait bound `dyn Send: Trait` is not satisfied
+  --> $DIR/unsized_coercion3.rs:11:1
+   |
+LL | fn hello() -> Box<impl Trait + ?Sized> {
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `Trait` is not implemented for `dyn Send`
+   |
+help: the trait `Trait` is implemented for `u32`
+  --> $DIR/unsized_coercion3.rs:9:1
+   |
+LL | impl Trait for u32 {}
+   | ^^^^^^^^^^^^^^^^^^
+
+error: aborting due to 3 previous errors
 
-For more information about this error, try `rustc --explain E0277`.
+Some errors have detailed explanations: E0277, E0308.
+For more information about an error, try `rustc --explain E0277`.