[Bug libstdc++/124568] [13/14/15 Regression] FAIL: 24_iterators/istreambuf_iterator/105580.cc - starting from r13-10137-g7aaccdab6a5f84

[tkaminsk at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=124568

--- Comment #2 from Tomasz Kamiński <tkaminsk at gcc dot gnu.org> ---
To be exact, the test pass on 13/14/15/16(trunk) on x86_64-linux (i.e. all
versions it was backported to), so I would need some help with investigation.