Bug in GCC / libstdc++: Space character categorized as non-printable by std::ctype<wchar_t>

[ASSI]

ASSI via Cygwin writes:
> This sounds like it might be a bug in newlib, so you should either
> report it there or else it would be the newlib integration for gcc.  In
> any case this needs to be fixed upstream.

The latter turns out to be the case, this is actually the same bug (and
will have the same fix) as:

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104587

If you go to the trouble of actually filing a bug with gcc it would be
helpful to post the information here as well, so that somebody can
follow up on it:

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115524


Regards,
Achim.
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