Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

mcs/tests/gtest-612.cs

@@ -0,0 +1,34 @@
+using System;
+
+class MainClass
+{
+	static byte count;
+
+	public static int Main ()
+	{
+		var x = Left () ?? Right();
+		if (count != 1)
+			return 1;
+
+		switch (Left ()) {
+		case 0:
+			return 2;
+		}
+
+		if (count != 2)
+			return 3;
+
+		Console.WriteLine ("ok");
+		return 0;
+	}
+
+	static int? Left()
+	{
+		return ++count;
+	}
+
+	static int? Right ()
+	{
+		return 0;
+	}
+}