[Bug c++/118347] Nested template class name inside template class with default parameter is not treated as a dependent template name

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118347

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Here is one without a default template argument:
```

template<typename T, typename T1>
struct holder
{
  template<typename F> struct fn {};

  template<typename T2>
  struct t2 : holder<T, T2>::fn<T1> {};          // fail
};
template<>
struct holder<int, int>
{
  template<typename T1>
  struct fn : holder<int, float>::fn<int> {};          // fail
};

holder<int, float>::t2<int> holder_1;

```

There is no ambigous of what <T1> means here since it can't be `less than`
because it would not be a name.