[Bug libstdc++/66262] [REGRESSION] testsuite failure with libstdc++ (gcc-5) and g++-4.9 together

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66262

--- Comment #12 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I'm not convinced this is a duplicate, the test tries to catch a
std::system_error not a std::ios::failure.

On Fedora 22 using the old ABI the test passes.