[Bug libstdc++/60662] simple use of call_once throws a system_error exception, but not if sleep_for is called beforehand

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60662

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I can't reproduce this with 4.8.1 or later versions on Fedora, or 4.8.3 on
Debian, neither using your original source code nor your preprocessed source.

Please try debugging this yourself or report it to Ubuntu.