[Bug libstdc++/46910] std::shared_ptr requires public destructor for a class with friend deleter

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46910

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2010.12.12 18:09:59
         AssignedTo|unassigned at gcc dot       |redi at gcc dot gnu.org
                   |gnu.org                     |
     Ever Confirmed|0                           |1

--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> 2010-12-12 
18:09:59 UTC ---
Created attachment 22727
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=22727
do not derive Sp_counted_deleter from Sp_counted_ptr

The problem is that the Sp_counted_deleter class inherits from Sp_counted_ptr
so even though Sp_counter_ptr::_M_dispose is never called, it does get
instantiated.

I'm testing this patch