[Bug libstdc++/66145] [5/6 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 #11 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Malcolm Parsons from comment #10)
> Why doesn't this apply to the std::ios_base exceptions?

Because the C++11 standard mandated an ABI change for std::ios_base::failure,
by giving it a std::system_error base class that wasn't present in C++03.