Throwing std::ios_base::failure on formatted input with gcc 6.2

[Jonathan Wakely]

On 27 October 2016 at 14:52, Edward Diener wrote:
> It sounds like you are also saying that there is no way to catch the old
> type, even if I wanted to, since the header file declaration has the
> decorated attribute.

No, the attribute is only present conditionally, see
https://gcc.gnu.org/onlinedocs/libstdc++/manual/using_dual_abi.html

If you compile with _GLIBCXX_USE_CXX11_ABI defined to zero then you
get the declaration of the old type (and the old COW std::string, and
the old std::list with O(n) size()).