Weird controlled behavior - Gnat 3.15p NT

[402450@cepsz.unizar.es (Jano)]

Hello,

see the following type declarations and lines of code:

   type Object is abstract new 
      Finalization.Controlled with null record;
   type Object_access is access all Object'Class;

   procedure Initialize (This : in out Object) is
   begin
      Trace.Log ("====>");      
   end Initialize;

   procedure Finalize   (This : in out Object) is
   begin
      Trace.Log ("<====");
   end Finalize;

   declare
      -- THIS LINE IS THE RELEVANT ONE.
      Thing : Object_access := 
         new Object'Class'(Object'Class'Input (Stream));
   begin
      null;
   end;

Ok, running normally or stepping with GVD when the line with the
stream reading is executed I get the following log:

====>
<====
<====
<====

Compiled with -O2 and without it if that means something. Consistently
with each object in the stream.

Now, I would assume that no Finalization could happen without a
corresponding Initialization, so is this normal? Is something wrong in
that read way?

Regards,

A. Mosteo.