[Bug fortran/46313] [OOP] class container naming collisions

["burnus at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46313

--- Comment #21 from Tobias Burnus <burnus at gcc dot gnu.org> 2011-01-07 13:25:56 UTC ---
(In reply to comment #19)
> (In reply to comment #18)
> class(two_three), allocatable :: a1
> class(three), allocatable :: a2

> In the dump you can see that we end up with one vtab for both types.

The simplest run-time test is to add:

  print *, same_type_as(a1,a2)

which should always be .FALSE. but is currently .TRUE.


Actually, also something else is odd: One finds in the dump a
            D.1555 = a1._vptr->_hash == a2._vptr->_hash;
even with the patch for PR 41580. However, the check in
gfc_simplify_same_type_as which tests:

+  if ((a->ts.type == BT_CLASS || b->ts.type == BT_CLASS)
+      && !gfc_type_compatible (&a->ts, &b->ts)
+      && !gfc_type_compatible (&b->ts, &a->ts))

should have succeeded as the (declared) type of "a1" is not type compatible to
"a2" - nor vice versa.