steady_clock windows bug

// https://issuetracker.google.com/147619573
// https://bugs.llvm.org/show_bug.cgi?id=43703

// The program waits for 7200 seconds, and prints the elapsed time every 10 seconds.
// It should always print an elapsed time of just over 10 seconds, but about every 1845
// seconds, it instead prints -1834.66 or so. (The performance counter frequency was 10MHz
// on Wine and the Windows 10 laptop I tested.)

#include <windows.h>

#include <chrono>
#include <thread>

int main() {
  LARGE_INTEGER freq;
  QueryPerformanceFrequency(&freq);
  printf("freq=%lld\n", (long long)freq.QuadPart);

  std::chrono::time_point<std::chrono::steady_clock> t1, t2;
  t1 = std::chrono::steady_clock::now();

  for (int i = 0; i < 7200 / 10; ++i, t1 = t2) {
    LARGE_INTEGER counter;
    QueryPerformanceCounter(&counter);

    t2 = std::chrono::steady_clock::now();
    std::chrono::duration<double> diff = t2 - t1;
    printf("%f - %lld (0x%016llx)\n",
           diff.count(),
           (long long)counter.QuadPart,
           (unsigned long long)counter.QuadPart * 1000000000ull);
    std::this_thread::sleep_for(std::chrono::seconds(10));
  }
  return 0;
}