Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

mcs/tests/gtest-379.cs

@@ -0,0 +1,28 @@
+struct S
+{
+	public static bool operator == (S a, S b)
+	{
+		return true;
+	}
+	
+	public static bool operator != (S a, S b)
+	{
+		return true;
+	}
+}
+
+public class C
+{
+	static int Print (S? i)
+	{
+		if (i != null)
+			return 5;
+		
+		return 0;
+	}
+	
+	public static int Main ()
+	{
+		return Print (null);
+	}
+}