1 files changed, 21 insertions, 0 deletions
diff --git a/tests/ui/object-safety/object-safety-supertrait-mentions-Self.rs b/tests/ui/object-safety/object-safety-supertrait-mentions-Self.rs
new file mode 100644
index 000000000..2445b33c8
--- /dev/null
+++ b/tests/ui/object-safety/object-safety-supertrait-mentions-Self.rs
@@ -0,0 +1,21 @@
+// Check that we correctly prevent users from making trait objects
+// form traits that make use of `Self` in an argument or return position.
+
+trait Bar<T> {
+    fn bar(&self, x: &T);
+}
+
+trait Baz : Bar<Self> {
+}
+
+fn make_bar<T:Bar<u32>>(t: &T) -> &dyn Bar<u32> {
+    t
+}
+
+fn make_baz<T:Baz>(t: &T) -> &dyn Baz {
+    //~^ ERROR E0038
+    t
+}
+
+fn main() {
+}