override and package

[Namespace]

Code:
----
import std.stdio;

class T1 {
protected:
	void _apply() {
		writeln("Call T1");
	}
}

class T2 : T1 {
public:
	override void _apply() {
		writeln("Call T2");
	}
}

class T3 : T1 {
protected:
	override void _apply() {
		writeln("Call T3");
	}
}

class T4 : T1 {
package:
	void _apply() { /// <-- [1]
		writeln("Call T4");
	}
}

void main()
{
	T1 t1 = new T1();
	T2 t2 = new T2();
	T3 t3 = new T3();
	T4 t4 = new T4();
	
	t1._apply();
	t2._apply();
	t3._apply();
	t4._apply();
}
----

Produce the correct output:
Call T1
Call T2
Call T3
Call T4

If I remove 'override' from T3 (or also T2) I get the correct 
deprecation message:
/d172/f194.d(19): Deprecation: overriding base class function 
without using override attribute is deprecated (f194.T3._apply 
overrides f194.T1._apply)

But if I try to write 'override' before [1], I get this error 
message:
Error: function T4._apply cannot override a non-virtual function

This seems inconsistent. I really overwrite the method, and then 
I put it in a package label.