Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

mcs/errors/cs1972.cs

@@ -0,0 +1,20 @@
+// CS1972: The indexer base access cannot be dynamically dispatched. Consider casting the dynamic arguments or eliminating the base access
+// Line: 18
+
+class A
+{
+	public int this [int i] {
+		get {
+			return i;
+		}
+	}
+}
+
+class B : A
+{
+	public void Test ()
+	{
+		dynamic d = null;
+		var r = base [d];
+	}
+}