[Bug c++/18757] New: ICE (on invalid) in get_innermost_template_args

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

When compiling:
struct S
{
  typedef void *P;
};

namespace M
{
  typedef void *P;
};

namespace N
{
class S;
struct N
{
  template <typename T> void foo (typename T::P);
};

struct R
{
  N& n;
  template <class U, class T> inline void bar (U p);
  void baz (M::P);
};

template <class U, class T>
inline void
R::bar (U p)
{
  n.foo <typename T> (p);
  delete this;
}

void R::baz (M::P p)
{
  bar <M::P, S>(p);
}

}

I get:
141300.ii: In member function `void N::R::bar(U) [with U = void*, T = N::S]':
141300.ii:36:   instantiated from here
141300.ii:30: internal compiler error: tree check: expected tree_vec, have
error_mark in get_innermost_template_args, at cp/pt.c:575
with checking enabled and usually segfault with checking disabled, in both
GCC 3.4.x and 4.0.0.
explicit_targs passed down from build_new_method_call is error_mark.

-- 
           Summary: ICE (on invalid) in get_innermost_template_args
           Product: gcc
           Version: 4.0.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: jakub at gcc dot gnu dot org
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18757