All versions from 4.4 to trunk reject this:

  template <template <typename> class... Args>
  struct Foo {
    static const int value = sizeof...(Args);
  };

  template <typename> struct Bar { };

  const int test = Foo<Bar>::value;


v.cc:3:44: error: missing template arguments before ')' token
     static const int value = sizeof...(Args);
                                            ^


Clang and ICC compile it ok.