1 files changed, 19 insertions, 0 deletions
diff --git a/tests/ui/generic-associated-types/issue-68656-unsized-values.rs b/tests/ui/generic-associated-types/issue-68656-unsized-values.rs
new file mode 100644
index 000000000..607cfed0b
--- /dev/null
+++ b/tests/ui/generic-associated-types/issue-68656-unsized-values.rs
@@ -0,0 +1,19 @@
+// Regression test for #68656
+
+trait UnsafeCopy<T: Copy> {
+    type Item<'a>: std::ops::Deref<Target = T>;
+
+    fn bug<'a>(item: &Self::Item<'a>) -> () {
+        let x: T = **item;
+        &x as *const _;
+    }
+}
+
+impl<T: Copy + std::ops::Deref> UnsafeCopy<T> for T {
+    type Item<'a> = T;
+    //~^ ERROR type mismatch resolving `<T as Deref>::Target == T`
+}
+
+fn main() {
+    <&'static str>::bug(&"");
+}