[Bug libstdc++/94749] std::istream::ignore discards too many characters

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94749

--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I have a patch but was waiting until after the GCC 11 release.

I'll look into it next week.