[Bug libstdc++/57641] New: std::timed_mutex.try_lock_until() is broken

[mustrumr97 at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57641

            Bug ID: 57641
           Summary: std::timed_mutex.try_lock_until() is broken
           Product: gcc
           Version: 4.8.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libstdc++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: mustrumr97 at gmail dot com

It uses the duration since the time_point's clock's epoch. What if it's not the
right clock? Different clocks may have different epochs. On my computer, the
function works OK if the time_point is from high_resolution_clock but doesn't
work if it's from steady_clock.