[Bug libstdc++/58038] std::this_thread::sleep_until can cause inifinite sleep

[m at matthewlai dot ca]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58038

--- Comment #13 from Matthew Lai <m at matthewlai dot ca> ---
(In reply to Jonathan Wakely from comment #11)
> (In reply to Matthew Lai from comment #8)
> > Here is another case where this bug caused a hard-to-find problem -
> > http://stackoverflow.com/questions/17574287/boostthread-attributes-setting-
> > call-stack-size
> > 
> > (last comment)
> 
> That seems to be about Boost.Thread so nothing to do with us.

Yeah that's in Boost, but it's the exact same bug in Boost. I linked it just to
show the kind of problem this can cause.

And thanks for the fix!