[Bug libstdc++/86419] codecvt::in() and out() incorrectly return ok in some cases.

[dmjpp at hotmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86419

--- Comment #12 from Dimitrij Mijoski <dmjpp at hotmail dot com> ---
Hello Jonathan. I posted a patch for this bug which I hope you'll find it
useful once you start working on this.
https://gcc.gnu.org/pipermail/libstdc++/2020-September/051073.html