[Bug c++/109935] CTAD for an aggregate with a dependent base class doesn't work

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109935

--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
The same is true even with a depedent field rather than base:
```
template <typename T>
struct C  {
        B<T> b;
};
```