Please describe the problem:
This has 2 conseguences:

1) Initialization of fields in the "super" class isn't performed
2) Finalization of fields in the "super" class isn't performed too, resulting in a possibly memory leak

Steps to reproduce:
$ cat cl.vala 
using GLib;

namespace Leaks
{

	[Compact]
	private class Super {
		public string super_field = "pippo";
	}

	private class SubClass : Super {
		public string subclass_field = "pluto";
	}

	private class SubSubClass : SubClass {
		public string subsubclass_field = "paperino";
	}

	public static void main (string[] args)
	{
	    var subsubclass = new SubSubClass ();
		print ("super: %s\nsubclass: %s\nsubsubclass: %s\n", subsubclass.super_field, subsubclass.subclass_field, subsubclass.subsubclass_field);
	    return;
	}
}

$ valac cl.vala 
$ ./cl 
super: (null)
subclass: (null)
subsubclass: paperino
$ 



Actual results:
The output is wrong:

super: (null)
subclass: (null)
subsubclass: paperino

Expected results:
this output:

super: pippo
subclass: pluto
subsubclass: paperino


Does this happen every time?
yes

Other information: