[Bug libstdc++/96161] istream::ignore sets eofbit too soon

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96161

--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
See also g:4e39f563c0cd25401f689c2093cb8c13692156ef