[Bug libstdc++/61166] overflow when parse number in std::duration operator""

[kan.liu.229 at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61166

--- Comment #3 from Kan Liu <kan.liu.229 at gmail dot com> ---
(In reply to emsr from comment #2)
> Created attachment 32789 [details]
> Patch to parse_nmber to make it unsigned long long all over.
> 
> Works on x86_64-linux.

Yeah, it works. Thank you!