[Bug libstdc++/60966] std::call_once sometime hangs

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60966

--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Thomas Sanchez from comment #4)
> Anyway, I pushed the actual code in this branch:
> https://github.com/daedric/httpp/tree/bug-promise-test
> 
> I was able to do a small test that can *sometimes* reproduce the bug:
> https://github.com/daedric/httpp/blob/bug-promise-test/tests/client/promise.
> cpp

Great, thanks, I will look into it.