1 files changed, 35 insertions, 0 deletions

diff --git a/src/test/ui/issues/issue-56229.rs b/src/test/ui/issues/issue-56229.rs
new file mode 100644
index 000000000..9e5897b98
--- /dev/null
+++ b/src/test/ui/issues/issue-56229.rs
@@ -0,0 +1,35 @@
+// check-pass
+
+trait Mirror {
+    type Other;
+}
+
+#[derive(Debug)]
+struct Even(usize);
+struct Odd;
+
+impl Mirror for Even {
+    type Other = Odd;
+}
+
+impl Mirror for Odd {
+    type Other = Even;
+}
+
+trait Dyn<T: Mirror>: AsRef<<T as Mirror>::Other> {}
+
+impl Dyn<Odd> for Even {}
+
+impl AsRef<Even> for Even {
+    fn as_ref(&self) -> &Even {
+        self
+    }
+}
+
+fn code<T: Mirror>(d: &dyn Dyn<T>) -> &T::Other {
+    d.as_ref()
+}
+
+fn main() {
+    println!("{:?}", code(&Even(22)));
+}