[Bug c++/113802] New: gcc rejects auto f(this auto self...) { }

[hewillk at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113802

            Bug ID: 113802
           Summary: gcc rejects auto f(this auto self...) { }
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: hewillk at gmail dot com
  Target Milestone: ---

struct S {
  auto f(this auto self...) {  }
};

int main() {
  S{}.f();
}

https://godbolt.org/z/a81WPW65f

GCC rejects the above code with:

<source>:2:10: error: an explicit object parameter cannot be a function
parameter pack
    2 |   auto f(this auto self...) {  }
      |          ^~~~~~~~~~~~~~

But there is no parameter pack here, this should be a variadic function (I
think?)
Only `auto f(this auto...) { }` has parameter pack.