[Bug libstdc++/106275] unordered_map with std::string key, std::hash, and custom equality predicate weirdness

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106275

--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #3)
> The __is_fast_hash trait is true for std::hash<std::string> but false for
> your custom hash function.

Oops, I mean the other way around! std::hash<std::string> is considered slow,
your custom hash function is not.