Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

mcs/tests/gtest-570.cs

@@ -0,0 +1,16 @@
+struct C<T>
+{
+	public static implicit operator C<T> (T value)
+	{
+		return default (C<T>);
+	}
+}
+
+class C
+{
+	public static void Main ()
+	{
+		C<bool?> p = true;
+		C<int?> p2 = (int?)null;
+	}
+}