bless tests

yay, I fixed the bug/missing feature :')
jieyouxu · Mar 8, 2025 · 80157a5 · 80157a5
1 parent b62d58f
commit 80157a5
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diff --git a/tests/ui/cast/ptr-to-trait-obj-wrap-add-auto.rs b/tests/ui/cast/ptr-to-trait-obj-wrap-add-auto.rs
@@ -10,16 +10,12 @@ struct X<T: ?Sized>(T);
 
 fn unwrap(a: *const W<dyn A>) -> *const (dyn A + Send) {
     a as _
-    //~^ error
-    //~| error
-    //~| error
+    //~^ error: cannot add auto trait `Send` to dyn bound via pointer cast
 }
 
 fn unwrap_nested(a: *const W<W<dyn A>>) -> *const W<dyn A + Send> {
     a as _
-    //~^ error
-    //~| error
-    //~| error
+    //~^ error: cannot add auto trait `Send` to dyn bound via pointer cast
 }
 
 fn rewrap(a: *const W<dyn A>) -> *const X<dyn A + Send> {

diff --git a/tests/ui/cast/ptr-to-trait-obj-wrap-add-auto.stderr b/tests/ui/cast/ptr-to-trait-obj-wrap-add-auto.stderr
@@ -1,87 +1,23 @@
-error[E0277]: the trait bound `W<(dyn A + 'static)>: A` is not satisfied
-  --> $DIR/ptr-to-trait-obj-wrap-add-auto.rs:12:5
-   |
-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:6:1
-   |
-LL | trait A {}
-   | ^^^^^^^
-   = note: required for the cast from `*const W<(dyn A + 'static)>` to `*const dyn A + Send`
-
-error[E0277]: `(dyn A + 'static)` cannot be sent between threads safely
-  --> $DIR/ptr-to-trait-obj-wrap-add-auto.rs:12:5
-   |
-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:8:8
-   |
-LL | struct W<T: ?Sized>(T);
-   |        ^
-   = note: required for the cast from `*const W<(dyn A + 'static)>` to `*const dyn A + Send`
-
-error[E0277]: the size for values of type `(dyn A + 'static)` cannot be known at compilation time
+error[E0804]: cannot add auto trait `Send` to dyn bound via pointer cast
   --> $DIR/ptr-to-trait-obj-wrap-add-auto.rs:12:5
    |
 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:8:8
-   |
-LL | struct W<T: ?Sized>(T);
-   |        ^
-   = note: required for the cast from `*const W<(dyn A + 'static)>` to `*const dyn A + Send`
-
-error[E0277]: the trait bound `W<(dyn A + 'static)>: A` is not satisfied
-  --> $DIR/ptr-to-trait-obj-wrap-add-auto.rs:19:5
-   |
-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:6:1
-   |
-LL | trait A {}
-   | ^^^^^^^
-   = note: required for the cast from `*const W<W<(dyn A + 'static)>>` to `*const W<dyn A + Send>`
-
-error[E0277]: `(dyn A + 'static)` cannot be sent between threads safely
-  --> $DIR/ptr-to-trait-obj-wrap-add-auto.rs:19:5
-   |
-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:8:8
+   |     ^^^^^^ unsupported cast
    |
-LL | struct W<T: ?Sized>(T);
-   |        ^
-   = note: required for the cast from `*const W<W<(dyn A + 'static)>>` to `*const W<dyn A + Send>`
+   = note: this could allow UB elsewhere
+   = help: use `transmute` if you're sure this is sound
 
-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:19:5
+error[E0804]: cannot add auto trait `Send` to dyn bound via pointer cast
+  --> $DIR/ptr-to-trait-obj-wrap-add-auto.rs:17:5
    |
 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:8:8
+   |     ^^^^^^ unsupported cast
    |
-LL | struct W<T: ?Sized>(T);
-   |        ^
-   = note: required for the cast from `*const W<W<(dyn A + 'static)>>` to `*const W<dyn A + Send>`
+   = note: this could allow UB elsewhere
+   = help: use `transmute` if you're sure this is sound
 
 error[E0804]: cannot add auto trait `Send` to dyn bound via pointer cast
-  --> $DIR/ptr-to-trait-obj-wrap-add-auto.rs:26:5
+  --> $DIR/ptr-to-trait-obj-wrap-add-auto.rs:22:5
    |
 LL |     a as _
    |     ^^^^^^ unsupported cast
@@ -90,7 +26,7 @@ LL |     a as _
    = help: use `transmute` if you're sure this is sound
 
 error[E0804]: cannot add auto trait `Send` to dyn bound via pointer cast
-  --> $DIR/ptr-to-trait-obj-wrap-add-auto.rs:31:5
+  --> $DIR/ptr-to-trait-obj-wrap-add-auto.rs:27:5
    |
 LL |     a as _
    |     ^^^^^^ unsupported cast
@@ -99,15 +35,14 @@ LL |     a as _
    = help: use `transmute` if you're sure this is sound
 
 error[E0804]: cannot add auto trait `Send` to dyn bound via pointer cast
-  --> $DIR/ptr-to-trait-obj-wrap-add-auto.rs:36:5
+  --> $DIR/ptr-to-trait-obj-wrap-add-auto.rs:32:5
    |
 LL |     a as _
    |     ^^^^^^ unsupported cast
    |
    = note: this could allow UB elsewhere
    = help: use `transmute` if you're sure this is sound
 
-error: aborting due to 9 previous errors
+error: aborting due to 5 previous errors
 
-Some errors have detailed explanations: E0277, E0804.
-For more information about an error, try `rustc --explain E0277`.
+For more information about this error, try `rustc --explain E0804`.
diff --git a/tests/ui/cast/ptr-to-trait-obj-wrap-different-args.rs b/tests/ui/cast/ptr-to-trait-obj-wrap-different-args.rs
@@ -10,14 +10,12 @@ 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>> {

diff --git a/tests/ui/cast/ptr-to-trait-obj-wrap-different-args.stderr b/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:12:5
    |
 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:6:1
-   |
-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:12:5
-   |
-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:8:8
-   |
-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:18:5
-   |
-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:6:1
+   |     ^^^^^^
    |
-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:18:5
+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:17:5
    |
 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:8:8
+   |     ^^^^^^
    |
-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:24:5
+  --> $DIR/ptr-to-trait-obj-wrap-different-args.rs:22:5
    |
 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:29:5
+  --> $DIR/ptr-to-trait-obj-wrap-different-args.rs:27:5
    |
 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:34:5
+  --> $DIR/ptr-to-trait-obj-wrap-different-args.rs:32:5
    |
 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`.
diff --git a/tests/ui/cast/ptr-to-trait-obj-wrap-different-regions.stderr b/tests/ui/cast/ptr-to-trait-obj-wrap-different-regions.stderr
@@ -1,56 +1,56 @@
-error[E0277]: the trait bound `W<(dyn A<'a> + 'static)>: A<'b>` is not satisfied
+error: lifetime may not live long enough
   --> $DIR/ptr-to-trait-obj-wrap-different-regions.rs:12:5
    |
+LL | fn unwrap<'a, 'b>(a: *const W<dyn A<'a>>) -> *const dyn A<'b> {
+   |           --  -- lifetime `'b` defined here
+   |           |
+   |           lifetime `'a` defined here
 LL |     a as _
-   |     ^ the trait `A<'b>` is not implemented for `W<(dyn A<'a> + 'static)>`
-   |
-help: this trait has no implementations, consider adding one
-  --> $DIR/ptr-to-trait-obj-wrap-different-regions.rs:6:1
+   |     ^^^^^^ function was supposed to return data with lifetime `'a` but it is returning data with lifetime `'b`
    |
-LL | trait A<'a> {}
-   | ^^^^^^^^^^^
-   = note: required for the cast from `*const W<(dyn A<'a> + 'static)>` to `*const dyn A<'b>`
+   = help: consider adding the following bound: `'b: 'a`
 
-error[E0277]: the size for values of type `(dyn A<'a> + 'static)` cannot be known at compilation time
+error: lifetime may not live long enough
   --> $DIR/ptr-to-trait-obj-wrap-different-regions.rs:12:5
    |
+LL | fn unwrap<'a, 'b>(a: *const W<dyn A<'a>>) -> *const dyn A<'b> {
+   |           --  -- lifetime `'b` defined here
+   |           |
+   |           lifetime `'a` defined here
 LL |     a as _
-   |     ^ doesn't have a size known at compile-time
-   |
-   = help: within `W<(dyn A<'a> + 'static)>`, the trait `Sized` is not implemented for `(dyn A<'a> + 'static)`
-note: required because it appears within the type `W<(dyn A<'a> + 'static)>`
-  --> $DIR/ptr-to-trait-obj-wrap-different-regions.rs:8:8
+   |     ^^^^^^ function was supposed to return data with lifetime `'b` but it is returning data with lifetime `'a`
    |
-LL | struct W<T: ?Sized>(T);
-   |        ^
-   = note: required for the cast from `*const W<(dyn A<'a> + 'static)>` to `*const dyn A<'b>`
+   = help: consider adding the following bound: `'a: 'b`
+
+help: `'b` and `'a` must be the same: replace one with the other
 
-error[E0277]: the trait bound `W<(dyn A<'a> + 'static)>: A<'b>` is not satisfied
+error: lifetime may not live long enough
   --> $DIR/ptr-to-trait-obj-wrap-different-regions.rs:18:5
    |
+LL | fn unwrap_nested<'a, 'b>(a: *const W<W<dyn A<'a>>>) -> *const W<dyn A<'b>> {
+   |                  --  -- lifetime `'b` defined here
+   |                  |
+   |                  lifetime `'a` defined here
 LL |     a as _
-   |     ^ the trait `A<'b>` is not implemented for `W<(dyn A<'a> + 'static)>`
-   |
-help: this trait has no implementations, consider adding one
-  --> $DIR/ptr-to-trait-obj-wrap-different-regions.rs:6:1
+   |     ^^^^^^ function was supposed to return data with lifetime `'a` but it is returning data with lifetime `'b`
    |
-LL | trait A<'a> {}
-   | ^^^^^^^^^^^
-   = note: required for the cast from `*const W<W<(dyn A<'a> + 'static)>>` to `*const W<dyn A<'b>>`
+   = help: consider adding the following bound: `'b: 'a`
 
-error[E0277]: the size for values of type `(dyn A<'a> + 'static)` cannot be known at compilation time
+error: lifetime may not live long enough
   --> $DIR/ptr-to-trait-obj-wrap-different-regions.rs:18:5
    |
+LL | fn unwrap_nested<'a, 'b>(a: *const W<W<dyn A<'a>>>) -> *const W<dyn A<'b>> {
+   |                  --  -- lifetime `'b` defined here
+   |                  |
+   |                  lifetime `'a` defined here
 LL |     a as _
-   |     ^ doesn't have a size known at compile-time
+   |     ^^^^^^ function was supposed to return data with lifetime `'b` but it is returning data with lifetime `'a`
    |
-   = help: within `W<(dyn A<'a> + 'static)>`, the trait `Sized` is not implemented for `(dyn A<'a> + 'static)`
-note: required because it appears within the type `W<(dyn A<'a> + 'static)>`
-  --> $DIR/ptr-to-trait-obj-wrap-different-regions.rs:8:8
+   = help: consider adding the following bound: `'a: 'b`
+
+help: `'b` and `'a` must be the same: replace one with the other
    |
-LL | struct W<T: ?Sized>(T);
-   |        ^
-   = note: required for the cast from `*const W<W<(dyn A<'a> + 'static)>>` to `*const W<dyn A<'b>>`
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: lifetime may not live long enough
   --> $DIR/ptr-to-trait-obj-wrap-different-regions.rs:24:5
@@ -77,6 +77,8 @@ LL |     a as _
    = help: consider adding the following bound: `'a: 'b`
 
 help: `'b` and `'a` must be the same: replace one with the other
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error: lifetime may not live long enough
   --> $DIR/ptr-to-trait-obj-wrap-different-regions.rs:30:5
@@ -136,4 +138,3 @@ help: `'b` and `'a` must be the same: replace one with the other
 
 error: aborting due to 10 previous errors
 
-For more information about this error, try `rustc --explain E0277`.
diff --git a/tests/ui/cast/ptr-to-trait-obj-wrap.rs b/tests/ui/cast/ptr-to-trait-obj-wrap.rs
@@ -3,6 +3,7 @@
 // structure, so these casts *are* fine.
 //
 // `unwrap` and `unwrap_nested` currently don't work due to a compiler limitation.
+//@ check-pass
 
 trait A {}
 
@@ -11,14 +12,10 @@ struct X<T: ?Sized>(T);
 
 fn unwrap(a: *const W<dyn A>) -> *const dyn A {
     a as _
-    //~^ error
-    //~| error
 }
 
 fn unwrap_nested(a: *const W<W<dyn A>>) -> *const W<dyn A> {
     a as _
-    //~^ error
-    //~| error
 }
 
 fn rewrap(a: *const W<dyn A>) -> *const X<dyn A> {