bless tests

yay, I fixed the bug/missing feature :')

Author: WaffleLapkin

tests/ui/cast/ptr-to-trait-obj-wrap-add-auto.rs

@@ -12,16 +12,14 @@ struct X<T: ?Sized>(T);
 
 fn unwrap(a: *const W<dyn A>) -> *const (dyn A + Send) {
     a as _
-    //~^ error
-    //~| error
-    //~| error
+    //~^ error: adding an auto trait `Send` to a trait object in a pointer cast may cause UB later on
+    //~| warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
 }
 
 fn unwrap_nested(a: *const W<W<dyn A>>) -> *const W<dyn A + Send> {
     a as _
-    //~^ error
-    //~| error
-    //~| error
+    //~^ error: adding an auto trait `Send` to a trait object in a pointer cast may cause UB later on
+    //~| warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
 }
 
 fn rewrap(a: *const W<dyn A>) -> *const X<dyn A + Send> {

tests/ui/cast/ptr-to-trait-obj-wrap-add-auto.stderr

@@ -1,87 +1,58 @@
-error[E0277]: the trait bound `W<(dyn A + 'static)>: A` is not satisfied
+error: adding an auto trait `Send` to a trait object in a pointer cast may cause UB later on
   --> $DIR/ptr-to-trait-obj-wrap-add-auto.rs:14:5
    |
 LL |     a as _
-   |     ^ the trait `A` is not implemented for `W<(dyn A + 'static)>`
+   |     ^^^^^^
    |
-help: this trait has no implementations, consider adding one
-  --> $DIR/ptr-to-trait-obj-wrap-add-auto.rs:8:1
+   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
+   = note: for more information, see issue #127323 <https://github.com/rust-lang/rust/issues/127323>
+note: the lint level is defined here
+  --> $DIR/ptr-to-trait-obj-wrap-add-auto.rs:6:9
    |
-LL | trait A {}
-   | ^^^^^^^
-   = note: required for the cast from `*const W<(dyn A + 'static)>` to `*const dyn A + Send`
+LL | #![deny(ptr_cast_add_auto_to_object)]
+   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
-error[E0277]: `(dyn A + 'static)` cannot be sent between threads safely
-  --> $DIR/ptr-to-trait-obj-wrap-add-auto.rs:14:5
+error: adding an auto trait `Send` to a trait object in a pointer cast may cause UB later on
+  --> $DIR/ptr-to-trait-obj-wrap-add-auto.rs:20:5
    |
 LL |     a as _
-   |     ^ `(dyn A + 'static)` cannot be sent between threads safely
-   |
-   = help: within `W<(dyn A + 'static)>`, the trait `Send` is not implemented for `(dyn A + 'static)`
-note: required because it appears within the type `W<(dyn A + 'static)>`
-  --> $DIR/ptr-to-trait-obj-wrap-add-auto.rs:10:8
+   |     ^^^^^^
    |
-LL | struct W<T: ?Sized>(T);
-   |        ^
-   = note: required for the cast from `*const W<(dyn A + 'static)>` to `*const dyn A + Send`
+   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
+   = note: for more information, see issue #127323 <https://github.com/rust-lang/rust/issues/127323>
 
-error[E0277]: the size for values of type `(dyn A + 'static)` cannot be known at compilation time
-  --> $DIR/ptr-to-trait-obj-wrap-add-auto.rs:14:5
+error: adding an auto trait `Send` to a trait object in a pointer cast may cause UB later on
+  --> $DIR/ptr-to-trait-obj-wrap-add-auto.rs:26:5
    |
 LL |     a as _
-   |     ^ doesn't have a size known at compile-time
-   |
-   = help: within `W<(dyn A + 'static)>`, the trait `Sized` is not implemented for `(dyn A + 'static)`
-note: required because it appears within the type `W<(dyn A + 'static)>`
-  --> $DIR/ptr-to-trait-obj-wrap-add-auto.rs:10:8
+   |     ^^^^^^
    |
-LL | struct W<T: ?Sized>(T);
-   |        ^
-   = note: required for the cast from `*const W<(dyn A + 'static)>` to `*const dyn A + Send`
+   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
+   = note: for more information, see issue #127323 <https://github.com/rust-lang/rust/issues/127323>
 
-error[E0277]: the trait bound `W<(dyn A + 'static)>: A` is not satisfied
-  --> $DIR/ptr-to-trait-obj-wrap-add-auto.rs:21:5
+error: adding an auto trait `Send` to a trait object in a pointer cast may cause UB later on
+  --> $DIR/ptr-to-trait-obj-wrap-add-auto.rs:32:5
    |
 LL |     a as _
-   |     ^ the trait `A` is not implemented for `W<(dyn A + 'static)>`
-   |
-help: this trait has no implementations, consider adding one
-  --> $DIR/ptr-to-trait-obj-wrap-add-auto.rs:8:1
+   |     ^^^^^^
    |
-LL | trait A {}
-   | ^^^^^^^
-   = note: required for the cast from `*const W<W<(dyn A + 'static)>>` to `*const W<dyn A + Send>`
+   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
+   = note: for more information, see issue #127323 <https://github.com/rust-lang/rust/issues/127323>
 
-error[E0277]: `(dyn A + 'static)` cannot be sent between threads safely
-  --> $DIR/ptr-to-trait-obj-wrap-add-auto.rs:21:5
+error: adding an auto trait `Send` to a trait object in a pointer cast may cause UB later on
+  --> $DIR/ptr-to-trait-obj-wrap-add-auto.rs:38:5
    |
 LL |     a as _
-   |     ^ `(dyn A + 'static)` cannot be sent between threads safely
-   |
-   = help: within `W<(dyn A + 'static)>`, the trait `Send` is not implemented for `(dyn A + 'static)`
-note: required because it appears within the type `W<(dyn A + 'static)>`
-  --> $DIR/ptr-to-trait-obj-wrap-add-auto.rs:10:8
+   |     ^^^^^^
    |
-LL | struct W<T: ?Sized>(T);
-   |        ^
-   = note: required for the cast from `*const W<W<(dyn A + 'static)>>` to `*const W<dyn A + Send>`
+   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
+   = note: for more information, see issue #127323 <https://github.com/rust-lang/rust/issues/127323>
 
-error[E0277]: the size for values of type `(dyn A + 'static)` cannot be known at compilation time
-  --> $DIR/ptr-to-trait-obj-wrap-add-auto.rs:21:5
-   |
-LL |     a as _
-   |     ^ doesn't have a size known at compile-time
-   |
-   = help: within `W<(dyn A + 'static)>`, the trait `Sized` is not implemented for `(dyn A + 'static)`
-note: required because it appears within the type `W<(dyn A + 'static)>`
-  --> $DIR/ptr-to-trait-obj-wrap-add-auto.rs:10:8
-   |
-LL | struct W<T: ?Sized>(T);
-   |        ^
-   = note: required for the cast from `*const W<W<(dyn A + 'static)>>` to `*const W<dyn A + Send>`
+error: aborting due to 5 previous errors
 
+Future incompatibility report: Future breakage diagnostic:
 error: adding an auto trait `Send` to a trait object in a pointer cast may cause UB later on
-  --> $DIR/ptr-to-trait-obj-wrap-add-auto.rs:28:5
+  --> $DIR/ptr-to-trait-obj-wrap-add-auto.rs:14:5
    |
 LL |     a as _
    |     ^^^^^^
@@ -94,30 +65,24 @@ note: the lint level is defined here
 LL | #![deny(ptr_cast_add_auto_to_object)]
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
+Future breakage diagnostic:
 error: adding an auto trait `Send` to a trait object in a pointer cast may cause UB later on
-  --> $DIR/ptr-to-trait-obj-wrap-add-auto.rs:34:5
+  --> $DIR/ptr-to-trait-obj-wrap-add-auto.rs:20:5
    |
 LL |     a as _
    |     ^^^^^^
    |
    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
    = note: for more information, see issue #127323 <https://github.com/rust-lang/rust/issues/127323>
-
-error: adding an auto trait `Send` to a trait object in a pointer cast may cause UB later on
-  --> $DIR/ptr-to-trait-obj-wrap-add-auto.rs:40:5
-   |
-LL |     a as _
-   |     ^^^^^^
+note: the lint level is defined here
+  --> $DIR/ptr-to-trait-obj-wrap-add-auto.rs:6:9
    |
-   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
-   = note: for more information, see issue #127323 <https://github.com/rust-lang/rust/issues/127323>
-
-error: aborting due to 9 previous errors
+LL | #![deny(ptr_cast_add_auto_to_object)]
+   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
-For more information about this error, try `rustc --explain E0277`.
-Future incompatibility report: Future breakage diagnostic:
+Future breakage diagnostic:
 error: adding an auto trait `Send` to a trait object in a pointer cast may cause UB later on
-  --> $DIR/ptr-to-trait-obj-wrap-add-auto.rs:28:5
+  --> $DIR/ptr-to-trait-obj-wrap-add-auto.rs:26:5
    |
 LL |     a as _
    |     ^^^^^^
@@ -132,7 +97,7 @@ LL | #![deny(ptr_cast_add_auto_to_object)]
 
 Future breakage diagnostic:
 error: adding an auto trait `Send` to a trait object in a pointer cast may cause UB later on
-  --> $DIR/ptr-to-trait-obj-wrap-add-auto.rs:34:5
+  --> $DIR/ptr-to-trait-obj-wrap-add-auto.rs:32:5
    |
 LL |     a as _
    |     ^^^^^^
@@ -147,7 +112,7 @@ LL | #![deny(ptr_cast_add_auto_to_object)]
 
 Future breakage diagnostic:
 error: adding an auto trait `Send` to a trait object in a pointer cast may cause UB later on
-  --> $DIR/ptr-to-trait-obj-wrap-add-auto.rs:40:5
+  --> $DIR/ptr-to-trait-obj-wrap-add-auto.rs:38:5
    |
 LL |     a as _
    |     ^^^^^^

tests/ui/cast/ptr-to-trait-obj-wrap-different-args.rs

@@ -11,14 +11,12 @@ struct X<T: ?Sized>(T);
 
 fn unwrap<F, G>(a: *const W<dyn A<F>>) -> *const dyn A<G> {
     a as _
-    //~^ error
-    //~| error
+    //~^ error casting `*const W<(dyn A<F> + 'static)>` as `*const dyn A<G>` is invalid
 }
 
 fn unwrap_nested<F, G>(a: *const W<W<dyn A<F>>>) -> *const W<dyn A<G>> {
     a as _
-    //~^ error
-    //~| error
+    //~^ error casting `*const W<W<(dyn A<F> + 'static)>>` as `*const W<dyn A<G>>` is invalid
 }
 
 fn rewrap<F, G>(a: *const W<dyn A<F>>) -> *const X<dyn A<G>> {

tests/ui/cast/ptr-to-trait-obj-wrap-different-args.stderr

@@ -1,82 +1,43 @@
-error[E0277]: the trait bound `W<(dyn A<F> + 'static)>: A<G>` is not satisfied
+error[E0606]: casting `*const W<(dyn A<F> + 'static)>` as `*const dyn A<G>` is invalid
   --> $DIR/ptr-to-trait-obj-wrap-different-args.rs:13:5
    |
 LL |     a as _
-   |     ^ the trait `A<G>` is not implemented for `W<(dyn A<F> + 'static)>`
-   |
-help: this trait has no implementations, consider adding one
-  --> $DIR/ptr-to-trait-obj-wrap-different-args.rs:7:1
-   |
-LL | trait A<T> {}
-   | ^^^^^^^^^^
-   = note: required for the cast from `*const W<(dyn A<F> + 'static)>` to `*const dyn A<G>`
-
-error[E0277]: the size for values of type `(dyn A<F> + 'static)` cannot be known at compilation time
-  --> $DIR/ptr-to-trait-obj-wrap-different-args.rs:13:5
-   |
-LL |     a as _
-   |     ^ doesn't have a size known at compile-time
-   |
-   = help: within `W<(dyn A<F> + 'static)>`, the trait `Sized` is not implemented for `(dyn A<F> + 'static)`
-note: required because it appears within the type `W<(dyn A<F> + 'static)>`
-  --> $DIR/ptr-to-trait-obj-wrap-different-args.rs:9:8
-   |
-LL | struct W<T: ?Sized>(T);
-   |        ^
-   = note: required for the cast from `*const W<(dyn A<F> + 'static)>` to `*const dyn A<G>`
-
-error[E0277]: the trait bound `W<(dyn A<F> + 'static)>: A<G>` is not satisfied
-  --> $DIR/ptr-to-trait-obj-wrap-different-args.rs:19:5
-   |
-LL |     a as _
-   |     ^ the trait `A<G>` is not implemented for `W<(dyn A<F> + 'static)>`
-   |
-help: this trait has no implementations, consider adding one
-  --> $DIR/ptr-to-trait-obj-wrap-different-args.rs:7:1
+   |     ^^^^^^
    |
-LL | trait A<T> {}
-   | ^^^^^^^^^^
-   = note: required for the cast from `*const W<W<(dyn A<F> + 'static)>>` to `*const W<dyn A<G>>`
+   = note: the trait objects may have different vtables
 
-error[E0277]: the size for values of type `(dyn A<F> + 'static)` cannot be known at compilation time
-  --> $DIR/ptr-to-trait-obj-wrap-different-args.rs:19:5
+error[E0606]: casting `*const W<W<(dyn A<F> + 'static)>>` as `*const W<dyn A<G>>` is invalid
+  --> $DIR/ptr-to-trait-obj-wrap-different-args.rs:18:5
    |
 LL |     a as _
-   |     ^ doesn't have a size known at compile-time
-   |
-   = help: within `W<(dyn A<F> + 'static)>`, the trait `Sized` is not implemented for `(dyn A<F> + 'static)`
-note: required because it appears within the type `W<(dyn A<F> + 'static)>`
-  --> $DIR/ptr-to-trait-obj-wrap-different-args.rs:9:8
+   |     ^^^^^^
    |
-LL | struct W<T: ?Sized>(T);
-   |        ^
-   = note: required for the cast from `*const W<W<(dyn A<F> + 'static)>>` to `*const W<dyn A<G>>`
+   = note: the trait objects may have different vtables
 
 error[E0606]: casting `*const W<(dyn A<F> + 'static)>` as `*const X<dyn A<G>>` is invalid
-  --> $DIR/ptr-to-trait-obj-wrap-different-args.rs:25:5
+  --> $DIR/ptr-to-trait-obj-wrap-different-args.rs:23:5
    |
 LL |     a as _
    |     ^^^^^^
    |
    = note: the trait objects may have different vtables
 
 error[E0606]: casting `*const W<W<(dyn A<F> + 'static)>>` as `*const W<X<dyn A<G>>>` is invalid
-  --> $DIR/ptr-to-trait-obj-wrap-different-args.rs:30:5
+  --> $DIR/ptr-to-trait-obj-wrap-different-args.rs:28:5
    |
 LL |     a as _
    |     ^^^^^^
    |
    = note: the trait objects may have different vtables
 
 error[E0606]: casting `*const (dyn A<F> + 'static)` as `*const W<dyn A<G>>` is invalid
-  --> $DIR/ptr-to-trait-obj-wrap-different-args.rs:35:5
+  --> $DIR/ptr-to-trait-obj-wrap-different-args.rs:33:5
    |
 LL |     a as _
    |     ^^^^^^
    |
    = note: the trait objects may have different vtables
 
-error: aborting due to 7 previous errors
+error: aborting due to 5 previous errors
 
-Some errors have detailed explanations: E0277, E0606.
-For more information about an error, try `rustc --explain E0277`.
+For more information about this error, try `rustc --explain E0606`.