[Bug libstdc++/66145] [5/6/7 Regression] std::ios_base::failure objects thrown from libstdc++.so use old ABI

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66145

--- Comment #30 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I don't plan to change this for gcc 5 and gcc 6, because changing the type of
exception thrown by the library doesn't seem appropriate for a minor release
within the 5.x or 6.x series.