[Bug c++/98714] New: [c++14] Nested type with variadic template class argument can't be expanded into using outer variadic types

[ryan_greenblatt at brown dot edu via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98714

            Bug ID: 98714
           Summary: [c++14] Nested type with variadic template class
                    argument can't be expanded into using outer variadic
                    types
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: ryan_greenblatt at brown dot edu
  Target Milestone: ---

https://godbolt.org/z/jjqEss
```
template<typename T>
constexpr int val = 0;

template <typename... T> struct NestedType {
  template <template <T...> class Inp>
  using Type = Inp<val<T>...>;
};

template <int> struct TakesInt {};

constexpr NestedType<int>::Type<TakesInt> a;
```
Happens on all the version of g++ I tried.