[Bug c++/70448] [6 Regression] ICE on invalid code on x86_64-linux-gnu: unexpected expression ‘f’ of kind overload

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70448

--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
...which only changes the default, so that's not it.