[Bug c++/33509] New: [4.3 Regression] tsubst_pack_expansion assumed to return TREE_VEC

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

See http://gcc.gnu.org/ml/gcc-patches/2007-09/msg01600.html

template<int M, int N> struct pair
{
  int i, j;
  pair() : i(M), j(N) {}
};

template<int... M> struct S
{
  template<int... N> static int foo() throw (pair <M, N>...)
  {
    return 1;
  }
};

int bar ()
{
  return S<0, 1, 2>::foo<0, 1> ();
}

ICEs in tsubst_exception_specification, tsubst_pack_expansion can return
here either TREE_VEC (handled), error_mark_node (not handled and should be)
or TYPE_PACK_EXPANSION (also needs handling).

Additionally, tsubst_pack_expansion return value needs checking for
error_mark_node rather than assuming it returns TREE_VEC in
regenerate_decl_from_template and tsubst_initializer_list.


-- 
           Summary: [4.3 Regression] tsubst_pack_expansion assumed to return
                    TREE_VEC
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Keywords: ice-on-invalid-code
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: jakub at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33509