[Bug libstdc++/86852] map and unordered_map wrong deduction guides for inilializer_list

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86852

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I think this is https://wg21.link/lwg3025