[Bug c++/124494] [reflection] ICE when reflecting on a decltype

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=124494

--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
finish_decltype_type should probably error for a USING_DECL as well, since in
this case cp_preserve_using_decl is active.