blessings

Author: WaffleLapkin

tests/ui/cast/cast-rfc0401-vtable-kinds.rs

@@ -4,16 +4,10 @@
 
 #![feature(unsized_tuple_coercion)]
 
-trait Foo<T> {
-    fn foo(&self, _: T) -> u32 { 42 }
-}
-
 trait Bar { //~ WARN trait `Bar` is never used
     fn bar(&self) { println!("Bar!"); }
 }
 
-impl<T> Foo<T> for () {}
-impl Foo<u32> for u32 { fn foo(&self, _: u32) -> u32 { self+43 } }
 impl Bar for () {}
 
 #[repr(C)]

tests/ui/cast/cast-rfc0401-vtable-kinds.stderr

@@ -1,5 +1,5 @@
 warning: trait `Bar` is never used
-  --> $DIR/cast-rfc0401-vtable-kinds.rs:11:7
+  --> $DIR/cast-rfc0401-vtable-kinds.rs:7:7
    |
 LL | trait Bar {
    |       ^^^

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

@@ -35,4 +35,4 @@ trait Assocked {
 
 fn change_assoc(x: *mut dyn Assocked<Assoc = u8>) -> *mut dyn Assocked<Assoc = u32> {
     x as _ //~ error: the trait bound `dyn Assocked<Assoc = u8>: Unsize<dyn Assocked<Assoc = u32>>` is not satisfied
-}
+}

tests/ui/suggestions/issue-114797-bad-parentheses-dyn-trait.fixed

@@ -3,9 +3,9 @@
 
 trait Trait {}
 
-fn assert_send(ptr: *mut dyn Trait) -> *mut (dyn Trait + Send) {
+fn assert_send() -> *mut (dyn Trait + Send) {
     //~^ ERROR incorrect parentheses around trait bounds
-    ptr as _
+    loop {}
 }
 
 fn foo2(_: &(dyn Trait + Send)) {}

tests/ui/suggestions/issue-114797-bad-parentheses-dyn-trait.rs

@@ -3,9 +3,9 @@
 
 trait Trait {}
 
-fn assert_send(ptr: *mut dyn Trait) -> *mut dyn (Trait + Send) {
+fn assert_send() -> *mut dyn (Trait + Send) {
     //~^ ERROR incorrect parentheses around trait bounds
-    ptr as _
+    loop {}
 }
 
 fn foo2(_: &dyn (Trait + Send)) {}

tests/ui/suggestions/issue-114797-bad-parentheses-dyn-trait.stderr

@@ -1,13 +1,13 @@
 error: incorrect parentheses around trait bounds
-  --> $DIR/issue-114797-bad-parentheses-dyn-trait.rs:6:49
+  --> $DIR/issue-114797-bad-parentheses-dyn-trait.rs:6:30
    |
-LL | fn assert_send(ptr: *mut dyn Trait) -> *mut dyn (Trait + Send) {
-   |                                                 ^            ^
+LL | fn assert_send() -> *mut dyn (Trait + Send) {
+   |                              ^            ^
    |
 help: fix the parentheses
    |
-LL - fn assert_send(ptr: *mut dyn Trait) -> *mut dyn (Trait + Send) {
-LL + fn assert_send(ptr: *mut dyn Trait) -> *mut (dyn Trait + Send) {
+LL - fn assert_send() -> *mut dyn (Trait + Send) {
+LL + fn assert_send() -> *mut (dyn Trait + Send) {
    |
 
 error: incorrect parentheses around trait bounds

tests/ui/traits/upcast_soundness_bug.rs

@@ -1,7 +1,8 @@
 #![feature(trait_upcasting)]
-// known-bug: #120222
-// check-pass
-//! This will segfault at runtime.
+// check-fail
+//
+// issue: <https://github.com/rust-lang/rust/pull/120222>
+//! This would segfault at runtime.
 
 pub trait SupSupA {
     fn method(&self) {}
@@ -56,6 +57,7 @@ pub fn user2() -> &'static dyn Trait<u8, u16> {
 fn main() {
     let p: *const dyn Trait<u8, u8> = &();
     let p = p as *const dyn Trait<u8, u16>; // <- this is bad!
+    //~^ error: the trait bound `dyn Trait<u8, u8>: Unsize<dyn Trait<u8, u16>>` is not satisfied
     let p = p as *const dyn Super<u16>; // <- this upcast accesses improper vtable entry
     // accessing from L__unnamed_2 the position for the 'Super<u16> vtable (pointer)',
     // thus reading 'null pointer for missing_method'

tests/ui/traits/upcast_soundness_bug.stderr

@@ -0,0 +1,11 @@
+error[E0277]: the trait bound `dyn Trait<u8, u8>: Unsize<dyn Trait<u8, u16>>` is not satisfied
+  --> $DIR/upcast_soundness_bug.rs:59:13
+   |
+LL |     let p = p as *const dyn Trait<u8, u16>; // <- this is bad!
+   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `Unsize<dyn Trait<u8, u16>>` is not implemented for `dyn Trait<u8, u8>`
+   |
+   = note: all implementations of `Unsize` are provided automatically by the compiler, see <https://doc.rust-lang.org/stable/std/marker/trait.Unsize.html> for more information
+
+error: aborting due to 1 previous error
+
+For more information about this error, try `rustc --explain E0277`.