5 files changed, 117 insertions, 0 deletions
diff --git a/tests/ui/dst/issue-113447.fixed b/tests/ui/dst/issue-113447.fixed
new file mode 100644
index 000000000..536f680f6
--- /dev/null
+++ b/tests/ui/dst/issue-113447.fixed
@@ -0,0 +1,25 @@
+// run-rustfix
+
+pub struct Bytes;
+
+impl Bytes {
+    pub fn as_slice(&self) -> &[u8] {
+        todo!()
+    }
+}
+
+impl PartialEq<[u8]> for Bytes {
+    fn eq(&self, other: &[u8]) -> bool {
+        self.as_slice() == other
+    }
+}
+
+impl PartialEq<Bytes> for &[u8] {
+    fn eq(&self, other: &Bytes) -> bool {
+        *other == **self
+    }
+}
+
+fn main() {
+    let _ = &[0u8] == &[0xAA][..]; //~ ERROR can't compare `&[u8; 1]` with `[{integer}; 1]`
+}
diff --git a/tests/ui/dst/issue-113447.rs b/tests/ui/dst/issue-113447.rs
new file mode 100644
index 000000000..c10a4f2ff
--- /dev/null
+++ b/tests/ui/dst/issue-113447.rs
@@ -0,0 +1,25 @@
+// run-rustfix
+
+pub struct Bytes;
+
+impl Bytes {
+    pub fn as_slice(&self) -> &[u8] {
+        todo!()
+    }
+}
+
+impl PartialEq<[u8]> for Bytes {
+    fn eq(&self, other: &[u8]) -> bool {
+        self.as_slice() == other
+    }
+}
+
+impl PartialEq<Bytes> for &[u8] {
+    fn eq(&self, other: &Bytes) -> bool {
+        *other == **self
+    }
+}
+
+fn main() {
+    let _ = &[0u8] == [0xAA]; //~ ERROR can't compare `&[u8; 1]` with `[{integer}; 1]`
+}
diff --git a/tests/ui/dst/issue-113447.stderr b/tests/ui/dst/issue-113447.stderr
new file mode 100644
index 000000000..240553a67
--- /dev/null
+++ b/tests/ui/dst/issue-113447.stderr
@@ -0,0 +1,25 @@
+error[E0277]: can't compare `&[u8; 1]` with `[{integer}; 1]`
+  --> $DIR/issue-113447.rs:24:20
+   |
+LL |     let _ = &[0u8] == [0xAA];
+   |                    ^^ no implementation for `&[u8; 1] == [{integer}; 1]`
+   |
+   = help: the trait `PartialEq<[{integer}; 1]>` is not implemented for `&[u8; 1]`
+   = help: the following other types implement trait `PartialEq<Rhs>`:
+             <[A; N] as PartialEq<[B; N]>>
+             <[A; N] as PartialEq<[B]>>
+             <[A; N] as PartialEq<&[B]>>
+             <[A; N] as PartialEq<&mut [B]>>
+             <[T] as PartialEq<Vec<U, A>>>
+             <[A] as PartialEq<[B]>>
+             <[B] as PartialEq<[A; N]>>
+             <&[u8] as PartialEq<Bytes>>
+           and 4 others
+help: convert the array to a `&[u8]` slice instead
+   |
+LL |     let _ = &[0u8] == &[0xAA][..];
+   |                       +      ++++
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0277`.
diff --git a/tests/ui/dst/issue-90528-unsizing-not-suggestion-110063.rs b/tests/ui/dst/issue-90528-unsizing-not-suggestion-110063.rs
new file mode 100644
index 000000000..c6ef8379f
--- /dev/null
+++ b/tests/ui/dst/issue-90528-unsizing-not-suggestion-110063.rs
@@ -0,0 +1,13 @@
+trait Test {}
+impl Test for &[u8] {}
+
+fn needs_test<T: Test>() -> T {
+    panic!()
+}
+
+fn main() {
+    needs_test::<[u8; 1]>();
+    //~^ ERROR the trait bound
+    let x: [u8; 1] = needs_test();
+    //~^ ERROR the trait bound
+}
diff --git a/tests/ui/dst/issue-90528-unsizing-not-suggestion-110063.stderr b/tests/ui/dst/issue-90528-unsizing-not-suggestion-110063.stderr
new file mode 100644
index 000000000..6752a4844
--- /dev/null
+++ b/tests/ui/dst/issue-90528-unsizing-not-suggestion-110063.stderr
@@ -0,0 +1,29 @@
+error[E0277]: the trait bound `[u8; 1]: Test` is not satisfied
+  --> $DIR/issue-90528-unsizing-not-suggestion-110063.rs:9:18
+   |
+LL |     needs_test::<[u8; 1]>();
+   |                  ^^^^^^^ the trait `Test` is not implemented for `[u8; 1]`
+   |
+   = help: the trait `Test` is implemented for `&[u8]`
+note: required by a bound in `needs_test`
+  --> $DIR/issue-90528-unsizing-not-suggestion-110063.rs:4:18
+   |
+LL | fn needs_test<T: Test>() -> T {
+   |                  ^^^^ required by this bound in `needs_test`
+
+error[E0277]: the trait bound `[u8; 1]: Test` is not satisfied
+  --> $DIR/issue-90528-unsizing-not-suggestion-110063.rs:11:22
+   |
+LL |     let x: [u8; 1] = needs_test();
+   |                      ^^^^^^^^^^ the trait `Test` is not implemented for `[u8; 1]`
+   |
+   = help: the trait `Test` is implemented for `&[u8]`
+note: required by a bound in `needs_test`
+  --> $DIR/issue-90528-unsizing-not-suggestion-110063.rs:4:18
+   |
+LL | fn needs_test<T: Test>() -> T {
+   |                  ^^^^ required by this bound in `needs_test`
+
+error: aborting due to 2 previous errors
+
+For more information about this error, try `rustc --explain E0277`.