[Bug libstdc++/123078] std::from_chars handles signedness of zero in underflow inconsistently with floating-point literals

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123078

--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #5)
> Or leave it uninitialized and enjoy a screenful of valgrind errors about the
> uninitialised value.

(interesting that valgrind always uses the British spelling even with LANG=C)