[Bug c++/33239] [4.1/4.2/4.3 Regression] internal compiler error in instantiate_class_template, at cp/pt.c:5666

["pcarlini at suse dot de" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #5 from pcarlini at suse dot de  2007-09-08 02:22 -------
Now the ICE is at line 6586. Can be triggered with this smaller snippet:

struct null_type;

template<typename T1, typename T2>
struct tuple_impl
{
  template<typename U>
  struct append
  {
    typedef tuple_impl<U, null_type> type;
  };

  int data;
};

template<typename T1, typename T2>
class tuple
: public tuple_impl<T1, null_type>::template append<T1>::type
{
  using tuple_impl<T1, null_type>::template append<T1>::type::data;
};

tuple<int, int>  my_tuple;

---------

Note that if I remove the now redundant template parameter T2 of tuple and
instantiate with typle<int>, we get immediately a bit of additional info:

33239_p2.C: In instantiation of ?tuple<int>?:
33239_p2.C:22:   instantiated from here
33239_p2.C:19: internal compiler error: tree check: accessed elt 2 of tree_vec
with 1 elts in tsubst, at cp/pt.c:8601


-- 

pcarlini at suse dot de changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |pcarlini at suse dot de


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33239