[Bug libstdc++/118093] New: std::future::wait_until futex call returns EINVAL for negative timeout smaller than 1s

[redi at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118093

            Bug ID: 118093
           Summary: std::future::wait_until futex call returns EINVAL for
                    negative timeout smaller than 1s
           Product: gcc
           Version: 15.0
               URL: https://gcc.gnu.org/pipermail/gcc-patches/2024-July/65
                    8118.html
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libstdc++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: redi at gcc dot gnu.org
  Target Milestone: ---

William Tsai reported this and contributed a patch fixing it:
https://gcc.gnu.org/pipermail/gcc-patches/2024-July/658118.html

#include <chrono>
#include <future>

int main()
{
  std::promise<void> p;
  std::chrono::system_clock::time_point tp(std::chrono::milliseconds{-10});
  (void) p.get_future().wait_until(tp);
}

../../../../../libstdc++-v3/src/c++11/futex.cc:145: bool
std::__atomic_futex_unsigned_base::_M_futex_wait_until(unsigned int*, unsigned
int, bool, std::chrono::seconds, std::chrono::nanoseconds): Assertion
'(*__errno_location ()) == 4 || (*__errno_location ()) == 11 ||
(*__errno_location ()) == 110 || (*__errno_location ()) == 38' failed.
Aborted (core dumped)



There's a simpler fix though:
https://gcc.gnu.org/pipermail/gcc-patches/2024-December/671852.html