Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

mcs/errors/cs0313.cs

@@ -0,0 +1,18 @@
+// CS0313: The type `S?' cannot be used as type parameter `T' in the generic type or method `S.Foo<T>(T)'. The nullable type `S?' never satisfies interface constraint `I'
+// Line: 16
+
+interface I
+{
+}
+
+struct S : I
+{
+	static void Foo<T> (T t) where T : I
+	{
+	}
+
+	static void Test (S? s)
+	{
+		Foo (s);
+	}
+}