Imported Upstream version 3.12.0

Former-commit-id: cf92446697332992ec36726e78eb8703e1f259d7

mcs/tests/test-null-operator-010.cs

@@ -0,0 +1,41 @@
+using System;
+
+class Test
+{
+	static void Main ()
+	{
+		Test_1 ("");
+		Test_1<object> (null);
+
+		Test_2<object> (null);
+		Test_2 ("z");
+		Test_2 (0);
+		Test_2 ((long?) -8);
+
+		Test_3 (new int[1]);
+		Test_3 (new int[] { 5 });
+	}
+
+	static void Test_1<T> (T x) where T : class
+	{
+		x?.Call ();
+	}
+
+	static void Test_2<T> (T x)
+	{
+		x?.Call ();
+	}
+
+	static void Test_3<T> (T[] x)
+	{
+		x[0]?.Call ();
+	}
+}
+
+static class Ext
+{
+	public static void Call<T> (this T t)
+	{
+		Console.WriteLine (typeof (T));
+	}
+}