[Bug libstdc++/119469] iter_rvalue_reference_t is wrong for function types

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119469

--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Patch posted: https://gcc.gnu.org/pipermail/gcc-patches/2025-March/679321.html