[Bug c++/117993] [15 regression] this->x is being rejected in a nested template class with a base of class of the outer templated class since r15-2117

[ppalka at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117993

--- Comment #7 from Patrick Palka <ppalka at gcc dot gnu.org> ---
(In reply to Patrick Palka from comment #6)
> (In reply to Andrew Pinski from comment #4)
> > (In reply to Andrew Pinski from comment #3) 
> > > I suspect for some reason we think the current instantiation does not have a
> > > dependent base for some reason.
> > 
> > That is any_dependent_bases_p is returning false for `struct B<T>::C<n>`
> > type.
> Indeed, so it seems any_dependent_bases_p should recursively consider
> indirect bases.
> 
> Or for
> 
>   template<class T>
>   struct B { template<class U> struct C; };
Whoops, this should be e.g.

  struct B : T { template<class U> struct C; };