[Bug libstdc++/70176] Regression with C++03 Issue cstdio

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70176

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Is this actually a regression? I don't think anything relevant changed in GCC 5
(there are related changes in GCC 6 though)