Imported Upstream version 5.10.0.47

Former-commit-id: d0813289fa2d35e1f8ed77530acb4fb1df441bc0

mcs/errors/cs8189.cs

@@ -0,0 +1,17 @@
+// CS8189: By reference return delegate does not match `C.D()' return type
+// Line: 15
+
+class C
+{
+	delegate ref int D ();
+
+	static int M ()
+	{
+		return 1;
+	}
+
+	static void Main ()
+	{
+		D d = new D (M);
+	}
+}