Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

mcs/tests/gtest-364.cs

@@ -0,0 +1,38 @@
+using System;
+
+namespace BugReport
+{
+	class Program
+	{
+		public static int Main()
+		{
+			A a = new A();
+			a.Counter++;
+			if (a.Counter != null)
+				return 1;
+			++a.Counter;
+			if (a.Counter != null)
+				return 2;
+			
+			a.Counter = 0;
+			a.Counter++;
+			if (a.Counter != 1)
+				return 3;
+			++a.Counter;
+			if (a.Counter != 2)
+				return 4;
+			
+			Console.WriteLine ("OK");
+			return 0;
+		}
+	}
+
+	class A {
+		private int? _counter;
+		public int? Counter {
+			get { return _counter; }
+			set { _counter = value; }
+		}
+	}
+}
+