[Bug libstdc++/95983] `std::counted_iterator>>` fails to satisfy `std::input_or_output_iterator`

[gcc-bugs at marehr dot dialup.fu-berlin.de via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95983

--- Comment #4 from gcc-bugs at marehr dot dialup.fu-berlin.de ---
Hi Patrick,

thank you for that patch. I guess that it also fixes
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96070.

Will this patch be backported to gcc-10?

Great work!